Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Explanation:
Answer:
what you think is gonna happen in an experiment
Explanation:
(05.05 MC) Exposing human subjects to experimental manipulations such as high levels of toxins is unethical. We often use model organisms for this reason. What attributes would you look for in selecting a good model organism for investigating the impact of toxins in humans? A good model organism should be able to be easily maintain in the laboratory, be fast growing, with a fast generation time and be as closely related to humans as possible. Cost is the only consideration in selecting a model organism, since all living things are made of cells anything found will apply to humans. The best choice will must be the very closely related to humans, such as chimps, since anything found in other species will not apply to humans. The most important consideration in selecting a model organism is how the public will feel about doing experiments on that species, so the best choice would generally be a very simple organism like bacteria that people don't care very much about.
Answer:
A good model organism should be able to be easily maintain in the laboratory, be fast growing, with a fast generation time and be as closely related to humans as possible.
Explanation:
The attributes that should be looked for in the selection of good model organism for investigating the impact of toxins in humans include:
Easy maintenance: The easier the maintenance of the organism, the better for both the research and the researcher. More can be achieved with less effort as opposed to high maintenance animals.Fast generation time: They should be able to grow and reproduce quickly so as not to prolong the experiment for too long. The lower the regeneration time, the shorter the time required to obtain adequate data for the research.Genetical similarity to humans: A good model organism for humans related study must share some similarities with humans at the genetic level. The more the genetic similarity, the more applicable the outcome of the research on humans.Hence, a good model organism should be able to be easily maintained in the laboratory, be fast-growing with a fast generation time, and be as closely related to humans as possible.
is the world safe place for animals and plants?
Guys pls answer it
Answer:
No it isn't
Explanation:
Nothing is ever safe everything is constantly trying to kill you and the same goes for animals. Wether it be humans or other animals and even their own bodies.
Answer:
Wildlife sanctuary is the place where wild animals are protected in their natural habitat. Here poaching or capturing the animals is prohibited. Biosphere reserves are the area used to conserve biodiversity like plants, animals and microorganisms. It contains many wildlife sanctuaries and national parks.
Explanation:
In response to increased levels of aldosterone, the kidneys produce In response to increased levels of aldosterone, the kidneys produce urine with a lower concentration of sodium ions. urine with a higher concentration of sodium ions. urine with less glucose. a larger volume of urine. urine with a lower concentration of potassium ions.
Answer:
The correct answer is urine with a lower concentration of sodium ions.
Explanation:
A hormone produced in the cortex or the outer section of the adrenal glands, which are located above the kidneys is known as aldosterone. The hormone plays an essential function in regulating the blood pressure primarily by functioning on the organs like colon and kidney to enhance the reabsorption of sodium or salt into the bloodstream and to enhance the concentration of potassium excreted in the urine.
Along with sodium, the hormone also works to reabsorb more concentration of water, which further increases the volume of blood and thus the blood pressure. Therefore, with the increase in the levels of aldosterone, the kidneys generate urine with a lower concentration of sodium ions.
In response to increased levels of aldosterone, the kidneys produce urine with a higher concentration of sodium ions. Therefore, option B is correct.
Aldosterone is a hormone produced by the adrenal glands, specifically in the zona glomerulosa of the adrenal cortex. It plays a crucial role in regulating sodium and potassium levels in the body.
When aldosterone levels increase, such as in response to low blood sodium levels or stimulation by the hormone angiotensin II. Then, it acts on the cells of the distal convoluted tubules and collecting ducts in the kidneys.
Learn more about aldosterone, here:
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What effect does insulin have on the body? It raises blood-sugar levels. It lowers blood-sugar levels. It raises glucagon levels. It lowers glucagon levels.
it regulates blood sugar level.
Explanation:
Insulin helps control blood glucose ( sugar) levels by signaling the liver and muscle and fat cells to take in glucose ( sugar) from the blood. Insulin therefore helps cells to take in glucose (sugar) to be used for energy. If the body has sufficient energy, insulin signals the liver to take up glucose ( sugar) and store it as glycogen.
A teacher collected some
beetles from a rotting log
and placed them in a
container of dry oatmeal in
her classroom. She kept the
box covered with a light cloth
so that the beetles could not
escape. She also asked one
of her students to add
potato and apple pieces
once a week to provide food
and moisture for the beetles.
After several weeks, the
student reported that there
were some strange-looking,
wormlike organisms in the
container
Answer:
beetle larva
Explanation:
What characteristic of sexual reproduction did Mendel investigate that resulted in offspring expressing characteristics that differed from their parents?
Explanation:
Mendel crossed two unlike parents to get offspring with characterestics that differ that of the parents
Mendel used the characteristic of sexual reproduction in which the genes from the two parents combine to form the offspring. This results in offspring expressing the characteristics that differed from their parents.
What is Sexual reproduction?Sexual reproduction is a type of reproduction in which the production of new organisms occur by the combination of genetic information of the two parents or individuals of different sexes. In most of the species, the genetic information is carried on the chromosomes in the nucleus of reproductive cells called gametes, which fuse to form a diploid zygote in the organism which matures to form a complete organism.
Mendel called the material which is responsible for the characteristics as "factors", and he proposed that during sexual reproduction, each of the parent contributed a form of this factor to the resulting offspring. This combination of the parental factors then determined which form of a trait will be visible in the offspring.
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Identify the part of the plant where photosynthesis primarily occurs.
Answer:
The part of plant where photosynthesis occurs is in the plant.
Explanation:
it has many layers of cell...and also a pigment called 'chlorophyll' (a molecule which absorbs light) because of which the process starts.
hope this helps you.
Raekwon wanted to see if listening to music would make the basketball players make more
baskets. On day one, he didn't play any music and counted how many baskets they could
make in 10 minutes. On day 2, he played rap music and counted the baskets, and on day 3,
he played classical music and counted the baskets. IV DV control
answer
IV-music
DV-baskets in 10 mins
control-the day no music was played
step by step
IV is the variable being adjusted to achieve variety of results
DV is the counts that will depend on the music played
control with no music only one variable was being tested the counts so a control is where one variable is being tested
How would the world be without atoms?
without atoms, the chemical elements wouldn't exist. then, molecules, then proteins, then life itself. basically we're made out of atoms just like everything else.
Which motion describes molecules in a solid at extremely low
temperatures? *
Moving freely and randomly in a space
Vibrating while closely packed together
Sliding around one another and colliding
Bumping together with some room to move
Answer:
vibrating while closely packed together
Explanation:
Your question has been heard loud and clear.
Vibrating while closely packed together is the right answer
Which of the following choices correctly shows an example of the way energy flows in an ecosystem? A. Rattlesnake to Hawk to Kangaroo Rat to Fungus to Cactus B. Fungus to Hawk toRattlesnake to Kangaroo Rat to Cactus C. Cactus to Kangaroo Rat to Rattlesnake to Hawk to Fungus D. Cactus to Fungus to Kangaroo Rat to Hawk to Rattlesnake
ANSWER:
C. Cactus to Kangaroo Rat to Rattlesnake to Hawk to Fungus
EXPLANATION
Living organisms in an ecosystem obtain energy by feeding on one another. As one organisms feeds on the other, ENERGY FLOWS. However, the flow of energy is UNIDIRECTIONAL. The flow of energy is represented by a FOOD CHAIN where the arrow signals which organism is feeding on which.
According to this question, a typical example of energy flow in a terrestrial ecosystem is as follows:
Cactus → Kangaroo rat → Rattlesnake → Hawk → Fungus
In the above food chain, energy flows as cactus plant (producer) is fed on by kangaroo rat (primary consumer), which is fed on by rattlesnake (secondary consumer), which is fed on by hawk (tertiary consumer). Hawk is decomposed by fungi (decomposer) when it dies. Energy flows in this direction.
Hence, an example of the way energy flows in an ecosystem is represented by Cactus to Kangaroo Rat to Rattlesnake to Hawk to Fungus
do foxes hunt alone yes or no.
yes. but occasionally they meet up with their packs during the night
Answer:
yes they hardley ever travel in packs
In 1937, a man employed to lay water pipes was found to be the source of a severe epidemic of typhoid fever. The man, an asymptomatic carrier of Salmonella enterica serotype Typhi, the bacterium that causes typhoid, habitually urinated at his job site. In the process, he contaminated the town's water supply with bacteria from his bladder. Over 300 cases of typhoid fever developed, and 43 people died before the man was identified as the carrier.
How was this carrier identified?
a) nasal swab
b) sputum sample
c) throat swab
d) urine culture
When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). Which two classes of DNA do these different samples represent
Answer:
Leading strand and Okazaki fragments
Explanation:
The two classes of DNA that the different samples represent include the leading strand and the Okazaki fragments.
The large molecules DNA with thousands/millions of nucleotides constitutes the leading strand of the DNA while the short stretches of DNA with just a few thousand nucleotides in light constitute the Okazaki fragments.
This is because, during replication, the leading strands of DNAs are usually synthesized in a continuous manner and end up forming a long, continuous daughter strand while the lagging strands are usually synthesized in short, discontinuous fragments known as the Okazaki fragments.
The continuous/discontinuous replication of the leading/lagging strands of the DNA is due to the characteristics of the enzyme responsible for adding bases to the growing daughter strands. The DNA polymerase enzyme can only add nucleotides in the 5' to ' direction.
An ecologist samples the abundance of various species along an environmental gradient and fails to find clusters of species. Instead, peaks of abundance of dominant species are merely randomly spaced segments along a continuum. This distribution of species supports the
Answer:
This distribution of species supports Gleason´s Individualistic concept of a community.
Explanation:
This theory was proposed by Gleason and it states that plant species respond individually to environmental factors that continuously change at spatial and temporal levels. This means that the combination and distribution of plants in a certain point or area are unique because each vegetable species has a different distribution pattern and a different tolerance and abundance rate. Hence each species´ response curve to a certain gradient has its own shape and size and it different from other species curves.
Plants assembly growing in an area is the result of environmental conditions and migration rate of species. As every area is continuously getting propagules of different species, the survival success of each plant depends not only in environmental factors, but also depends on the tolerance to other new species and their interactions. This combination along a gradient always results in different composition and abundance of species. This is why a sample can not be confined to a clearly defined vegetable community.
This point of view is known as individualistic or continuum concept of vegetable community. Gleason believed that vegetable species were distributed as a continuum and that communities can not be identified as combinations of associated species that repeat in space.
Independent and Dependent Variable Practice
DIRECTIONS: Read the information about each experiment and record the independent variable (IV) and dependent variable (DV). Then write a hypothesis for each experiment. Be sure to use an “if, then, because” statement.
Will an egg float higher in water with more salt?
IV:
DV:
Hypothesis:
Willy and Billy want to know if stretching a rubber band at different lengths affects how far the rubber band will fly. They will use centimeters for all measurements.
IV:
DV:
Hypothesis:
Will a paper airplane with longer wings fly farther than shorter wings?
IV:
DV:
Hypothesis:
Will a plant grow higher with more light?
IV:
DV:
Hypothesis:
Milly and Bob want to know if the amount of baking soda added to vinegar will affect the height a rocket will launch. They will measure the baking soda in milliliters. They will measure the height of the rocket launch in meters.
IV:
DV:
Hypothesis:
Carrie and Heather wanted to know if the size of a coin will affect the number of drops of water it can hold. So they use a dropper to place water on a quarter, nickel, and penny.
IV:
DV:
Hypothesis:
I wonder if the amount of studying I complete has an effect on my science test scores?
IV:
DV:
Hypothesis:
Answer:
1) IV: The quantity of salt added
DV: The resultant density of the salinated water
Hypothesis: The egg will float when the mass of the volume of the salinated solution displaced by the egg is equal to or larger than the mass of the egg
2) IV: The extension of the rubber band above original length in centimetres
DV: The distance flown by the rubber band
Hypothesis: The potential energy stored in the rubber band by pulling will be transformed into kinetic energy and the larger the extension, the larger the stored potential energy, and the larger the resultant kinetic energy, the higher the velocity and the further the distance flown
3) IV: The wing span of a paper airplane
DV: The distance flown by the plane
Hypothesis; The glide of the airplane is a factor of the wings span increased wingspan increased glide and increased travel distance
4) IV: Presence of more light
DV: Height to which plant grows
Hypothesis: Photosynthesis, which is the conversion of carbon dioxide and water into glucose and oxygen in the presence of Sunlight is essential for plant growth and the more the presence on light is increases the higher plant will tend to grow
5) IV: Amount of vinegar in the canister
DV: The height a rocket will launch
Hypothesis: With a given amount of baking soda, in the canister a little amount of vinegar causes a delayed launch but an increased build up of carbon dioxide resulting in higher height reached than when more vinegar is used in which case the lift off will be more rapid but the power will be lesser and the height reached reduced
6: IV: Surface area of the coin
DV: The number of drops held
Hypothesis: Due to surface tension and cohesion which are properties that increase with surface area and as such a coin with a larger surface area holds more water drops
7. IV: Number of hours of study
DV: Science score
Hypothesis: A student science scores is directly related to the amount of science topics thought the student is able to respond to in a test and it is directly proportional to the amount of study the student has done related to the science topics
Explanation:
You collect a specimen from a deep jungle survey. It appears to be a new species. You
get to name it, but before you can, you must classify it first. It appears to be single celled,
and contains chloroplasts. When a few of them are kept in the dark too long, they die.
Under the microscope you can see a dark colored nucleus. What classification fits them
best?
O A. Archaeabacteria
B. Fungus
C. Plant
OD. Plant-like protist
Answer:
The correct option is;
D. Plant-like protist
Explanation:
Protists are a broad collection of not so strictly connected microscopic unicellular (single celled) eukaryotic organisms that is neither a fungus, plant, or an animal but are categorized under the kingdom known as Protista
Protophyta is a known plant-like protist that is made of single celled algae
Other single-celled chloroplast containing protists are diatoms, and dinoflgelates.
how are phenotypes impacted by mutations
Answer:
I guess phenotypes are not affected by mutations since mutations affect the gene structure of organisms while phenotypic characteristics are acquired through ones life time therefore no relationship between the two
The image below shows plant cells.
plant cells
What feature of cell theory is best demonstrated in the image?
A.
Cells are formed from other cells.
B.
Cells are the basic units of structure and make up tissues.
C.
Organisms are made up of a few similar cells.
D.
Organisms have cells with different shapes and functions.
Does human have link with their genes(from their family)?
Answer:
Yes genes are the features of either the mother of father
Explanation:
The hydrosphere does not overlap with any other spheres true or false
Answer:
False
Explanation:
It overlaps with the lithosphere. Since some rocks produce water.
Answer:
False
Explanation:
Drag each label to the correct location on the table. Each label can be used more than once.
Identify the voice used in each sentence.
Sentences
Voice
Phil went to a movie with his friends.
The peanut butter is being added
to the cake by the chef.
The blue dress had been put on
display by the store assistant.
Karl gave a touching speech at his
graduation ceremony.
Jacob's party will be attended by
everyone in town
Fred played with a monkey during
his first trip to a zoo
active
passive
Answer:
1. Phil went to a movie with his friends - active voice
2. The peanut butter is being added
to the cake by the chef - passive voice
3. The blue dress had been put on
display by the store assistant - passive voice
4. Karl gave a touching speech at his
graduation ceremony - active voice
5. Jacob's party will be attended by
everyone in town - passive voice
6. Fred played with a monkey during
his first trip to a zoo - active voice
Explanation:
In English language, the voice of a sentence can either be passive or active.
A sentence is said to be ACTIVE if the subject is performing the action (verb). Hence, the sentence is referring to the subject doing the verb's action directly. For example;
1. Phil went to a movie with his friends
2. Karl gave a touching speech at his
graduation ceremony
3. Fred played with a monkey during
his first trip to a zoo
These are examples of sentences (1,2,3) in active voice because the subjects are performing the actions in the sentence.
On the contrary, a sentence is in the PASSIVE VOICE when the subject is acted upon by the verb in the sentence. In other words, the subject becomes the receiver of the veeb's action. For example;
4. The peanut butter is being added
to the cake by the chef
5. The blue dress had been put on
display by the store assistant
6. Jacob's party will be attended by
everyone in town
The above examples (4,5,6) are all in passive voices because the subjects in the sentences are acted upon by the verbs.
From Scenario t What is the Dependent Variable? *
the flower
the flower color
O the flower with no fertilizer
when the flower blooms
Answer:
The flower color
Explanation:
Answer:
The flower color
Explanation:
Which is represented by the image?
Answer:
represent by image.
Explanation:
To store an image on a computer, the image is broken down into tiny elements called pixels. A pixel (short for picture element) represents one colour. ... In order for the computer to store the image, each pixel is represented by a binary value. We call this representation of colours a “bit-plane”.
Which of the following group behaviors is primarily offensive, rather than defensive?
Answer:
Abusive behaviour, Discrimination or harassment are offensive.
Explanation:
Abusive behaviour, Discrimination or harassment are the behaviour which is offensive not defensive because in these behaviour people show aggression towards other people which is offensive in nature. These behaviour should be avoided because these behaviours hurt people and disturbance occurs in the society. These types of behaviour shows true color of the individual and the family he belong.
which type of cell(s) contain ribosomes?
Answer:
Ribosomes are found in prokaryotic and eukaryotic cells; in mitochondria, chloroplasts and bacteria. Those found in prokaryotes are generally smaller than those in eukaryotes. Ribosomes in mitochondria and chloroplasts are similar in size to those in bacteria. hope this is good enough to help you
Explanation:
Durante la explosión de una planta nuclear como la ocurrida en Chernóbyl en 1986, una persona se expone por un tiempo a esta radiación ¿qué daños a nivel molecular (ADN O ARN) podría sufrir? Y ¿cómo afectaría esto su salud y a la de su descendencia?
Answer:
mediante mutaciones en el ADN
Explanation:
El desastre ecológico de Chernóbil estuvo asociado a la liberación de importantes cantidades de radiación en forma de radioisótopos hacia la atmósfera, como producto de la explosión de un reactor que contenía toneladas de uranio radiactivo. La exposición a este tipo de radiación aumenta las probabilidades de sufrir mutaciones en la molécula de ADN. Dicho de otro modo, la radiación incrementa las chances de sufrir cambios en el material genético hereditario. Las mutaciones generalmente son corregidas por los mecanismos de reparación del ADN; sin embargo, existen ocasiones donde las mutaciones no son reparadas. Por otro lado, las mutaciones a menudo tienen efectos deletéreos y por lo tanto están asociadas a enfermedades, ya que los cambios en la secuencia genética provocan consecuentemente también cambios en las proteínas codificadas por estos genes. Por ejemplo, las mutaciones sufridas por genes supresores de tumores se encuentran asociadas a la aparición de células cancerosas por el mal funcionamiento de dichos genes. El efecto de la mutación depende del tipo celular que sufre la mutación: aunque las mutaciones sufridas por células somáticas pueden afectar la salud, estos tipos de mutaciones no son heredadas (simplemente porque las células somáticas no se heredan), mientras que las mutaciones sufridas por células germinales, es decir, en las células encargadas de la formación de gametos, pueden ser transmitidas a la descendencia.
A living microorganism or its toxin may cause human disease that is transported through the US MAIL MUST be marked as a:________.A. MordantB. VirusC. InfestationD. Etiologic agent
-gene 1
-gene 2
-gene 3
How are these three genes related?
Answer:
Depends on the locations of these gene segment on the chromosome whether it be found on the same or different.
It can either be linked or unlinked.
A research biologist is studying cells from a new organism recently discovered in the Brazilian rainforest. She determines that the somates contain a total of 10 chromosomes. How many possible combinations of chromosomes could this organism produce as a result of independent assortment
Answer:
32 possible combination of chromosome
Explanation:
According to the law of independent assortment as proposed by Mendel, alleles of a gene will separate into gamete independently of the alleles of another gene. Since this organism contains 10 chromosomes in its somatic cell, it will undergo meiosis to produce half number of chromosomes in its gametes i.e. 5 chromosomes.
If we know the haploid number of chromosomes of an organism i.e. n, we can calculate the possible combination of chromosomes that will be present in its gametes as a result of independent assortment during meiosis using the formula:
2^n, where n= haploid no. of chromosome
If n is 5 chromosome in this case, the possible combination of chromosome in its gametes will be 2^5 = 32. Hence, as a result of independent assortment, an organism with 10 chromosome in its somatic cell will produce 32 possible combinations of chromosome in its gametes.
