Which of the following are shown in karyotypes?
a
sex chromosomes
b
homologous chromosomes
c
autosomes
d
all of the above
Answer:
Karyotypes describe the chromosome count of an organism and what these chromosomes look like under a light microscope. Attention is paid to their length, the position of the centromeres, banding pattern, any differences between the sex chromosomes, and any other physical characteristics.
Explanation:
As this karyotype displays, a diploid human cell contains 22 pairs of homologous chromosomes and 2 sex chromosomes. ... The maternal and paternal chromosomes in a homologous pair have the same genes at the same locus, but possibly different alleles.
Fresh steak is said to have both negative and positive redox potential. Discuss how the redox potential affects the microbial ecology of the food
Answer:
Increases redox potential decreases microbial growth inside food.
Explanation:
The redox potential is considered as one of the most complex indicators of the physical conditions of microbial cultures. The measurement of redox potential could be very useful for the determination of qualitative and quantitative parts of the microbial contamination. During the bacterial growth, the redox potential of the medium decreases. Redox potential is a measure of the tendency of a biological species which can be acquire or lose electrons through ionization. If the redox potential of the medium is increases, there will be lower growth of microbes in the food and vice versa.
someone pls help w this
Answer:
B.
Explanation:
Please, serious answers only, don't search it up. Can an animal adapt into a new species? If so, why?
Answer:
Hi how are you doing today Jasmine
Answer:
Yes, an animal can adapt into a new species through a process called speciation. Speciation occurs when a population of animals undergoes significant changes over time, leading to the formation of a new species that is different from the original one.
Explanation:
REASONThe main reason for this adaptation and the emergence of a new species is natural selection. Natural selection is the process by which individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring. Over many generations, these advantageous traits become more common in the population, while individuals without these traits become less common.
When a population of animals faces different environmental conditions or habitats, it can create diverse selection pressures. Some individuals may possess traits that allow them to better adapt to these new conditions, giving them a higher chance of survival and reproduction. As these advantageous traits become more prevalent in the population, they can eventually lead to reproductive isolation.
Reproductive isolation occurs when individuals from the original population can no longer mate and produce fertile offspring with individuals from the newly adapted population. This can happen due to genetic differences and changes that have accumulated over time. When reproductive isolation is complete, the two populations are considered separate species.
SUMMARYOverall, the process of adaptation and the formation of new species is driven by natural selection, which favors traits that enhance an organism's chances of survival and reproduction in specific environments. Over time, these changes can accumulate, leading to the development of distinct species.
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Which of the karyotypes shown is from a normal female?
Answer:
Karyotype C is from a normal female
Aiden is having soup for lunch when the doorbell rings. He gets up from the
table, leaving his metal spoon in the bowl of hot soup. When he comes back a
few minutes later, the spoon is hot.
This is an example of ______________________
. I know this becaus
Answer:
23
Explanation:
Nice edge 40r0
PLZ HELP ASAP (BRAINLIEST)
The orbital radii of four planets in our solar system is shown in the following table.
Orbital Radii
Planet Orbital Radii (AU)
W 5.2
X 0.72
Y 0.37
Z 19.1
Which planets are likely to be inner planets?
W and X
X and Y
Y and Z
X and Z
Answer:
x and y
Explanation:
x and y have the smallest orbital radius so they are likely to be inner planets while w and z have bigger orbital radius so the probability of them being inner planets is low.
Hope this helps.
1. Which of the following most accurately complete the statement below -
An increase in biodiversity result in
A. More competition for abiotic factors
B. Less competition for biotic factors
C. An increase in the sustainability of an ecosystem
D. A decrease in the sustainability of an ecosystem
Answer:
The correct answer is - C. An increase in the sustainability of an ecosystem.
Explanation:
Biodiversity is the variety of different biological species and populations on the earth or in an ecosystem. Biodiversity helps in maintaining health by providing food and other resources. Higher biodiversity healthier the earth.
Sustainability is the ability to maintain the ecological process and its structure and function in case of external stress for a longer time. The more sustainability of an ecosystem the healthier the ecosystem. The biodiversity of an ecosystem provides sustainability to the ecosystem. An increase in biodiversity will lead to a more sustainable ecosystem.
Which of the following is necessary for a geothermal plant to function?
Your answer:
biomass
fossil fuels
heated rock
hydrogen
sunlight
Answer:
Geothermal power plants use hot water to generate steam to turn a turbine for electricity generation. Since the heat of the water is the essential component of a geothermal power plant, these active systems are typically located where hydrothermal reservoirs exist.
Many desert mammals have developed a nocturnal lifestyle. This means that during the day they sleep underground in their burrows, and they come out to eat and play at night. What is a good reason for a desert fox to show this pattern of behavior?
Answer:
A good reason why a desert fox shows this pattern of behavior is to protect themselves from cold conditions since at nighttime, it gets very cold in the desert!
Explanation:
Nocturnal is a type of animal behaviour shown when the animals are active at night time and inactive at daytime. Desert fox shows this behaviour so that it can avoid the hot daytime of the desert.
What is nocturnal behaviour?Nocturnal lifestyle is the behaviour adopted by animals that are active at night time and are inactive during the daytime. During the daytime, they rest in the cool burrows, holes and underground canals to prevent the loss of water and to protect themselves from the extremely hot environment.
The desert animals like desert foxes have adapted the nocturnal lifestyle to avoid the extreme heat during the daytime and sleep in their underground burrows. Instead, they come out during the night when it is cool in deserts to eat and play.
Nocturnal lifestyle is shown by the diurnal animals that rest and sleeps in the burrows, holes and cool places during the hot time of the day.
Therefore, the desert fox shows a nocturnal lifestyle.
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A transcriptional repressor that controls the transcription of gene A is not normally active unless bound by an effector molecule X. In a certain cell, the domain of the repressor that binds to the silencer of gene A is mutated so that the repressor-X complex can no longer bind to its recognition site. With all other factors being the same, what effect do you predict on the transcription of gene A if X is increased in the cell and the cell is already expressing gene A
Answer:
Transcription of gene A is not affected
Explanation:
A transcriptional repressor is a DNA/RNA-binding protein that acts to suppress gene expression and/or protein synthesis by binding to target sequences. Moreover, a silencer is a DNA region that binds to particular transcriptional repressors in order to suppress gene expression. In this case, the transcriptional repressor is activated by binding to an effector molecule X (e.g., another protein). In consequence, and since the activated repressor-X complex is not more able to bind the silencer of gene A, it is expected that such complex will not be able to affect transcription of the target gene.
In a separate location, take notes from the sources you've identified. The notes will provide details for your presentation
While taking notes, you may want to use these reading strategies C. Write down one or two pieces of information per
topic that you intend to use in your presentation.
Topic
Chemical reactions of fossil fuels
Difference between biomass and fossil fuels
Comparing biomass with other renewable
energy sources
Making energy choices locally
Answer:
CH4 + 2O2 -----> CO2 + 2H2O.
Explanation:
CH4 + 2O2 -----> CO2 + 2H2O is the chemical reaction of burning of fossil fuels. The main difference between biomass and fossil fuels is that biomass is biological material which can be derived from living whereas Fossil fuel such as coal, oil and gas are derived from biological material. Biomass is renewable because a new crop can be grown after each harvest, and biomass is a low carbon fuel. Biomass is renewable just like other renewable energy sources because both can be used again and again. The energy choices locally occurs according to the availability of energy resources in that locality.
The oxygen cycle is closely related to which other cycle?
A. The carbon cycle
B. The nitrogen cycle
C. The phosphorus cycle
Answer:
A
Explanation:
that what i think
i don't know if I'm right
If the DNA code for the amino acid alanine is CGA, the tRNA anticodon for alanine is ?
1.)AGC
2.)CGA
3.)CGT
4.)GCU
Answer:
2
Explanation:
state what action muscles can complete
Answer:
Flexion
Extension
Abduction
Addiction
Explanation:
hope it helps
What are sister chromatids?
O the matched set of two chromosomes
O the protein structures moving the chromosomes
O the middle region of a replicated chromosome
O he two identical copies of one chromosome
Answer:
hi how are you doing today Jasmine
6. Samples of atmospheric air and exhaled air were analysed by four groups
of students for oxygen and carbon (IV) oxide content. The following are
the results, expressed in volumes per thousand:
(i) Amount of oxygen in atmosphere = 200
(ii) Amount of oxygen in exhaled air = 160
(iii) Amount of carbon (IV) oxide in atmosphere = 300
(iv) Amount of carbon (IV) oxide in exhaled air =41
Explain the difference in volume of each gas between the atmosphere and
the exhaled air.
Answer:
Due to difference in volume of both atmosphere.
Explanation:
There is difference in volume of carbondioxide and oxygen gas between the atmosphere and the exhaled air because of the volume difference of atmosphere and exhaled air. The volume of atmosphere is larger than the body from where the gases are exhaled. The body has lower space for these gases so these gases are less in concentration in the exhaled air which the body releases as compared to the atmosphere where the concentration of these gases are larger.
4. which of these substances cannot pass through cell membranes?
A.Starch. B.Glycerol.
C. Amino acids. D. Monosaccharides
Answer:
C. Amino acids. D. Monosaccharides
Explanation:
I think this is the answer hope it helps!
4. How should the fossils in the sediment layers of Earth appear if species have evolved over time?
A. All of the layers should contain fossils of simple organisms.
B. All of the layers should contain fossils of complex organisms.
C. The lower layers should contain fossils of more complex organisms.
D. The upper layers should contain fossils of more complex organisms.
Answer:
D the upper layers
Explanation:
at first, lifeforms were simple. they got more complex for a variety of reasons, including to adapt to the changing earth. simple organisms will be lower down for that reason.
The lower layers should contain fossils of more complex organisms. So, the correct option is (C).
What are Fossils?A fossil is defined as the preserved remains, imprint or trace of something that once lived from a previous geological era. Examples of fossils are bones, shells, exoskeletons, fossilized traces of animals or microbes, objects preserved in amber, hair, petrified wood, and DNA residues. The totality of fossils is known as the fossil record.
There are four main types of fossils which are formed in different way are conducive to preserving different types of organisms. Fossils are mold fossils, cast fossils, trace fossils and true form fossils.
Fossil layers are fossils that formed in sedimentary rock that formed in layers by depositing and pressing sediments on top of each other.
Thus, the lower layers should contain fossils of more complex organisms. So, the correct option is (C).
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Which of the following is an advantage of sexual reproduction over asexual reproduction?
Answer:
1. Leads to mixing of genetic materials hence variation within species
2. Leads to offspring with hybrid viguor that tend to show high and adaptability to environmental conditions.
3. Variations due to sexual reproduction leads to improvement of species hence evolutionary changes that may bring about specialisation
Which of the following are mechanical waves?
A sound wave
B earthquake wave
C surface wave
D electromagnetic wave
Answer:
A) sound wave.
Explanation:
A sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum
What benefit did land plants offer as they became more abundant ?
Complete the passage to differentiate between longitudinal and transverse waves.
A longitudinal wave is a type of wave that transfers energy
to the direction of wave motion. A transverse wave, on the other hand, is a type of wave that transfers energy
to the direction of wave motion.
Answer:
transverse Waves transfer energy at right angle while longitudinal waves transfers energy parallel
Muscles are named in a variety of ways; the muscles on the sides of the head are named according to their
a. size.
b. location.
c. action.
d. location of insertion.
Answer:
Muscles are named in a variety of ways; the muscles on the sides of the head are named according to their location.
Artificial Selection is another name for _____________.
Answer:
selective breeding
Explanation:
Artificial selection is also known as selective breeding. Selective breeding refers to the process of breeding plants or animals selectively.
Some ocean plants, such as photosynthetic algae, benefit when dissolved CO2 levels in ocean water are elevated. Complete the
chemical equation by dragging and dropping components of the equation into the boxes that BEST explains how algae use CO2 for
photosynthesis
Answer:
CO2 + H2O ---SUNLIGHT--------> C6H12O6 + O2
Explanation:
In the process of photosynthesis, carbondioxide reacts with water molecules in the presence of sunlight forming glucose molecules and oxygen gas. The carbondioxide enters the plant body through small openings called stomata, these stomata opens when there is sunlight whereas water enters the plant body through roots from the soil and reaches to the leaves. In leaves both combine produces glucose which can be stored in different parts of the body and some oxygen is used by the plants in the process of respiration and extra is released through stomata.
What is the outer skin called
Answer:
Epidermis
Explanation:
The epidermis is the thin outer layer of the skin.
Answer: The epidermis is the thin outer layer of the skin.
Explanation:
In guinea pigs, the short hair trait is dominant. If two heterozygous guinea pigs were crossed, what would be the phenotypes of the offspring? *
A. 100percent short hair
B. 75 percent short and 25 percent long.
C. 50percent short and 50 percent long
D. 25 percent short and 75 percent long
Minerals in sediment may seep into the ______________ and replace the body’s material with minerals that harden over time.
Answer:
erm
Explanation:
digestive system.
no idea
Which of these is true for a fetus by the end of the first trimester of fetal
development?
A. Its weight is half what it will be at birth.
B. Its lungs are fully developed.
O C. Its placenta has served its purpose.
.
D. Its external sex organs have formed.
Answer:
the answer is A :)!!!!!!!!!
