Answer:
The pollutants like heavy metals, organic solvents present in pesticides exist in small amounts in the atmosphere. During the process of the food chain, the concentration of these pollutants progressively keeps on increasing through different trophic levels. For example, fish eats a lot of planktonic growth may retain the pollutants in their tissues, birds or people that eat the fish might concentrate the pollutants still more. This process of accumulation of pollutants at different trophic levels is called as biomagnification. So, the correct answer is 'Assertion is correct but Reason is incorrect'.
what evidence shows that biological molecules on earth form naturally?
Explanation:
La siguiente entrada tiene como objetivo realizar una breve explicación sobre las moléculas biológicas lipídos y carbohidratos, las cuales son muy diversas ya que están formadas por carbono, lo cual hace que puedan formar muchos tipos de enlaces. Esta capacidad permite que las moléculas orgánicas adopten muchas formas complejas, como son las cadenas, las ramificaciones y los anillos.
Las moléculas biológicas son grandes polímeros que sintetizas para poder enlazarse con otras subunidades mucho mas pequeñas conocidos como monómeros. Las cadenas de subunidades estan unidas por enlaces covalentes los cuales se forman por deshidratación, estas cadenas pueden romperse por hidrólisis. La moléculas biologicas más importantes son los carbohidratos, lípidos, proteínas y ácidos nucleicos.
Which one of the following physical quantities is formed after dividing mass of volume?
I} Weight
II} Velocity
III} Density
IV}Work
Answer:
Density
Explanation:
Density is refer to how much space an object in Mass take in volume.
It is mass if an object divided by volume.
It usually in g/cm3
Which of the following are the three areas of the tundra biome? (Choose all that apply.)
Arctic
Asian
Antarctic
alpine
Answer:
The three areas of the tundra biome are artic, antarctic and alpine.
Transmission of microbes by direct contact includes: a.drinking contaminated water. b.touching a contaminated countertop. c.inhaling dust-borne microbes. d.sexual intercourse.
Answer:
B is correct
Explanation:
All of the following statements about ferns are correct except:_________
A) ferns flourish in many habitats, but the majority are located in the tropics.
B) the sporophyte is a conspicuous generation.
C) sori are located on the back or ventral surface of fronds.
D) the gametophyte is a conspicuous generation.
E) ferns have underground stems called rhizomes.
Answer: B) because in higher plants, such as angiosperms and gymnosperms, the sporophyte is the dominant generation.
All of the following statements about ferns are correct except the gametophyte is a conspicuous generation. Therefore, the correct option is D.
In ferns the gametophyte is usually much smaller and less noticeable, whereas the sporophyte is the more noticeable generation. The sporophyte, the famous giant pearl fern plant, is a major stage in the fern life cycle. Gametes (eggs and sperm) are produced by the gametophyte, which is a small, autonomous stage responsible for sexual reproduction.
Therefore, the correct option is D.
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Which of the following is an example of evolution?
A. Plants colonizing inland areas after developing vascular systems that can hold and transport water.
B. An organism developing immunity to a disease after surviving it.
C. A Chameleon changing color when entering a different environment.
D. An organism dying because it is not adapted to its habitat.
Answer: B
Explanation: because it adapt to its environment to survive
The development of an organ system like a vascular system over a long period of time in plants is an example of evolution. Thus option A is correct.
What is evolution?Evolution is a series of events that have taken place in several years to make the species more advanced for the environment due to the introduction of multiple mutations in the genetic sequence.
During evolution, plants have gained the genetic mutation that codes for the vascular system which provide support and transports water in plants. So option A is correct.
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Match the following items.
1 .
nephrons
attachment of leg to pelvic girdle at hip
2 .
pancreas
reabsorption by the kidney of needed materials
3 .
ball and socket joint
attachment of vertebrae to skull
4 .
pivot joint
knee cap
5 .
villi
basic functioning unit of kidneys
6 .
patella
stores bile
7 .
gall bladder
muscle attachment to more movable bone of a joint
8 .
tubules
tiny sacs within the lungs
9 .
alveoli
projections inside small intestine
10 .
insertion
secretes digestive enzymes
Answer:
Nephrons - basic functioning unit of kidneys
Pancreas - secretes digestive enzymes
Ball and socket joint - attachment of leg to pelvic girdle at hip
Pivot joint - attachment of vertebrae to skull
Villi - projections inside small intestine
Patella - knee cap
Gall bladder - stores bile
Tubules - reabsorption by the kidney of needed materials
Alveoli - tiny sacs within the lungs
Insertion - muscle attachment to more movable bone of a joint
As per observation ,all the matches are correct for all options.
Nephrons - functioning unit of kidneys.pancreas - digestive enzymes. joint - attachment of leg.joint - attachment of vertebrae.Villi - projections small intestine.patella - knee cap.Gall bladder - stores bile.Tubules - through the kidney of materials.Alveoli - sacs in the lungs.Insertion - muscle to more movable bone of joint.What is a joint?
These are the joints on the knee and it has movable joints.
Thus it is clearly explained.
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What is the structure of the middle ear?
Answer:
The middle ear is a narrow air-filled cavity in the temporal bone. It is spanned by a chain of three tiny bones—the malleus (hammer), incus (anvil), and stapes (stirrup), collectively called the auditory ossicles.
Explanation:
Hope this helps!;)
Importance of antimicrobial emulsion
Answer:
Citral is a typical essential oil used in the food, cosmetic, and drug industries and has shown antimicrobial activity against microorganisms. Citral is unstable and hydrophobic under normal storage conditions, so it can easily lose its bactericide activity. Nanoemulsion technology is an excellent way to hydrophilize, microencapsulate, and protect this compound. In our studies, we used a mixed surfactant to form citral-in-water nanoemulsions, and attempted to optimize the formula for preparing nanoemulsions. Citral-in-water nanoemulsions formed at So 0.4 to 0.6 and ultrasonic power of 18 W for 120 seconds resulted in a droplet size of < 100 nm for nanoemulsions. The observed antimicrobial activities were significantly affected by the formulation of the nanoemulsions. The observed relationship between the formulation and activity can lead to the rational design of nanoemulsion-based delivery systems for essential oils, based on the desired function of antimicrobials in the food, cosmetics, and agrochemical industries.
Where is the heart situated in the body and vertebrates ?
Answer:
The Heart is situated in the Left side of the body
How are growth and development dinstinct from each other
Answer:
Growth is a physical change in ones body size that can be easily observed.
Development is the ability to do things complex, challenging, and difficult.
Soil moisture (wethess) is
important for...?
A. it is a determination of how much water the soil can
hold and how easily water moves through,
B. it is evidence of how easily the process of runoff in
which the soil is filtered can occur.
C. Both & B
D. None of the above
Explanation:
Soil moisture is a key variable in controlling the exchange of water and heat energy between the land surface and the atmosphere through evaporation and plant transpiration.
Breast milk is naturally formulated to meet the nutritional needs of a growing infant.
a. True
b. False
If you're running away from a bear, A) both your liver cells and my leg muscle cells will be running glycolysis. B) both your liver cells and my leg muscle cells will be running gluconeogenesis. C) your liver cells will be running gluconeogenesis and your leg muscle cells will be running glycolysis. D) your liver cells will be running glycolysis and your leg muscle cells will be running gluconeogenesis.
Answer:
C) your liver cells will be running gluconeogenesis and your leg muscle cells will be running glycolysis.
I want answers please
Explanation:
1.arm&base
2.a shutter controlled by a lever
3.Nosepiece,objective lenses,stage clips
6. 100X.....(this means that the image being viewed will appear to be 100 times its actual size
Is the scorpion vertebrate ?
Answer:
scorpions are invertebrates but are insects
Answer:
A animal that is an vertebrate has a spine, and backbone. Some of these animals can be humans, dogs, cats, etc. But most 6 legged creatures, 8 legged creatures do not have a backbone.
To answer your question, no, scorpions are not vertebrates because they do not a spine and backbone.
in some plants pink flowers are dominant over yellow flowers if Mario crosses two hybrids what happens
I need help please???
Answer:
The first one is called longitudinal wave .
the longish point is , i think 1
Why did the White House experience water damage ?
1.
It is made of granite which is strong.
2. It is made of sandstone which is very porous and is easily penetrated by rainwater
3. It is made of non-porous sedimentary rock
The White House building is made of sandstone which is very porous as a result water is easily penetrated inside it which causes damage and make the walls of building weak.
The White House is made of gray-colored sandstone that is brought from quarry in Aquia, Virginia. The north and south porticos of white house building are constructed with red Seneca sandstone brought from Maryland. These sandstones are porous in which rainwater is easily penetrated in it that cause damage to the white house building so it is concluded that the building is made of porous sandstone.
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If a diglyceride is formed, how many water molecules are involved?
a.
One.
b.
It depends upon the length of the fatty acids involved.
c.
Two.
d.
Three.
e.
None.
Answer:
b.
It depends upon the length of the fatty acids involved
water is an important chemical that dissolves other chemicals into what
Answer:
A Solution
Explanation:
A substance that is dissolved is a solution
Jacqueline is a 42-year-old woman who is in her third trimester of pregnancy. Jacqueline has had three other children; their birth weights were 9.0 lbs, 9.5 lbs and 9.3 lbs. Jacqueline is a smoker with high blood pressure, and has gained 75 pounds during the last 4 months. 1. What is your diagnosis? 2. What test can you use to confirm your diagnosis? 3. What is Jacqueline's prognosis? 4. What treatments are available?
Diabetes mellitus is a metabolic condition that occurs when the pancreas fails to produce enough insulin or when the body fails to use the insulin produced for glucose metabolism thereby leading to hyperglycaemia (increased blood glucose levels).
In pregnancy, diabetes is suspected in women who give this type of history:
Previous Delivery of babies weighing 9.0lbs and above.Cigarette smoking. And abrupt weight gain toward term of pregnancy.Constant monitoring of Jacqueline is required to prevent complications during and after the pregnancy. This is done by performing series of tests and giving insulin injections when the need arises.
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Which of the following statements about continuous variables is
A. continuous variables must lie between a clearly defined interval
B. continuous variables may be restricted to positive values
C. continuous variables will never be nonzero
D. continuous variables must always be restricted to positive values
Answer:
I think it's A
must lie btn a clearly defined interval
Continues variable must be between a clearly defined the interval about continuous variables. Thus,option A is correct.
What is continuous variables?A continuous variables is define as a function which continuous varies in a given interval for instance, if a variable over a non-empty range of the real numbers is continuous, then it can take on any value in that range.
Types of continuous variables:
There are two types of continuous variables which are mentioned below:-
1:- Instant variable
2:- Ratio variable
Instant variable
A variable can be defined as the distance or level which are varies between given interval.
Ratio variable
Ratio variable is another type of continuous variables which has only one variation in given interval.
Therefore, continues variable must be between a clearly defined the interval about continuous variables. Thus, option A is correct.
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Given the gene sequence GGACCGTCGATCTTC, which of the following choices would represent an inversion mutation?
A. CCACCGTCGATCTTC
B. GGACTCGATCTTC
C. GGACCGTCGATCTTC
D. GGACCGTCGATCCTT
Reset Selection
ASAP
Answer:
D. GGACCGTCGATCCTT
Explanation:
Mutation refers to any change in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. According to the question, an INVERSION mutation is a type of mutation in which a segment of a gene gets broken off and reattached in another way on the same DNA. Hence, the only change in inversion mutation is the arrangement of the nucleotide bases on the gene.
Considering the nucleotide sequence: GGACCGTCGATCTTC, the sequence that describes an occurrence of inversion mutation is: GGACCGTCGATCCTT because the segment TTC in the original sequence has been rearranged as CTT in the mutated sequence.
state 6 importance of respiration
Answer
Respiration is important because it produces energy that is essential for the normal functioning of the body.Respiration provides cells with oxygen and expels toxic carbon dioxide.It provides pure oxygen to alive and for proper functions.It is very important to live alive.It supply and remove oxygen and carbon dioxide. It has a leading role in functioning in the human body.The process by which dissolved gases are exchanged between the blood and interstitial fluids is Select one: a. cellular respiration. b. diffusion. c. external respiration. d. breathing. e. pulmonary ventilation.
Answer:
b. diffusion.
Explanation:
Diffusion can be defined as the movement of gas molecules from a region of high concentration to a region of lower concentration until an equilibrium is attained or reached. This mixing of gas molecules in the liquid or gaseous state is due to their kinetic energy of random motion i.e without requiring bulk motion.
This ultimately implies that, diffusion is a phenomenon through which gas molecules in either a gaseous or liquid state spread out in response to a concentration gradient, which is simply the difference in concentration of the gases across a space.
During diffusion, molecules move from areas of high concentration to areas of low concentration.
In this context, the process by which dissolved gases are exchanged between the blood and interstitial fluids is referred to as diffusion.
On a related note, this process is also referred to as internal respiration because it involves the exchange of oxygen gas and carbon (II) oxide gas between tissue cell and capillaries.
1) What is the function of the plasma membrane? (5pts)
2) How does high and low temperature affect a plasma membrane's fluidity? (5pts)
3) How does passive transport differ from active transport? (5pts)
4) What are the three main types of passive transport? Describe each of them. (5pts)
5) List the three types of tonic solutions and describe which way water moves in each one. (5pts)
Answer:
1.Plasma membrane is a semi permiable layer present in a plant cell.it allows only selected substances to pass in and out of the cell.
what is adaptation give any four characters of aquatic plants
Explanation:
Animals have special features that help them to live in a particular place. Therefore this features is called adaptation.
1] Aquatic plants have leaves that float on the surface of water.
2] Thier leaves are rarely have stomata.
3] Thier leaves can perform all the work without xylem.
4] They are usually lack cuticle layer in order to avoid excessive dryness.
Answer:
The most common adaptation is the presence of lightweight internal packing cells, aerenchyma, but floating leaves and finely dissected leaves are also common. Aquatic plants can only grow in water or in soil that is frequently saturated with water.
Four characters of aquatic plants are as given below:
1) most aquatic plants donot need culticles or have thin culticles as cuticles prevent loss of water.
2) aquatic plants keep their stomata always open for they do not need to retain water.
3) on each side of their leaves are a number of stomata.
4) aquatic plants have less rigid structure since water pressure supports them.
Explanation:
I hope this answer help you.
When neuroscientists employ the term "nucleus", they are usually referring to:_____.
a. a cluster of glial cells in the dorsal-medial CNS.
b. a neural unit composed of anatomically and functionally related neurons.
c. a group of homologous ganglia located either in the cortex or in the cerebellum.
d. cognitively synchronized clusters of apical dendrites anywhere in the PNS.
Answer:
B. A neural unit composed of anatomically and functionally related neurons.
The numbers of each genotype of mice in the questions above shows that there are more dark mice living on the dark substrate and more light mice living on the light colored substrate. But when we consider comparative overall fitness for the entire area, which fur color seems to have the greatest overall selective advantage, and why
Answer:
Dark colour.
Explanation:
Dark fur color seems to have the greatest selective advantage because of their hard physical body which occurs due to extreme environmental conditions. The dark colour of mice occurs due to the high intensity of sunlight which increases melanin in their skin. These dark colour mice pass through a very hard and extreme environmental conditions so that's why Dark fur color seems to have the greatest selective advantage.
