Answer:
because natural selection only acts on traits that impact reproductive success.
Typically, acetylation of histone tails leads to ________. Typically, acetylation of histone tails leads to ________. relaxed packaging of the chromatin and increased transcription activation of topoisomerase removal of the protein components of the chromatin from the DNA tighter packaging of the chromatin and reduced transcription increased amounts of euchromatin relative to heterochromatin
Answer:
relaxed packaging of the chromatin and increased transcription.
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Basically, nucleotide comprises of the following parts;
1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.
2. A phosphate group.
3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.
The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;
I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.
II. Phosphate: this is the structural backbone that provides support to DNA.
Histones are a group of highly basic proteins that are mainly associated with deoxyribonucleic acid (DNA) in the nucleus of a living organism and are responsible for condensing it to chromatin.
Typically, acetylation of histone tails leads to relaxed packaging of the chromatin and increased transcription.
Transcription can be defined as a process which typically involves re-writing the informations contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.
What process is responsible for producing most of Earth's oxygen?
A.) photosynthesis
B.) respiration
Answer:
Photosynthesis
I hope this helps!
Explanation:
How is relative dating of fossils different from absolute dating?
Answer:
Absolute dating is the actual date of the rock and can also been known as radioactive dating. Relative dating is using the rock layers and fossil records to determine the age of the rock, and it is not the actual age of the rock. :)
Explanation:
Where do frog get money from ?
Answer:
me
Explanation:
from me, ihave money
Answer:
from their mouths
Explanation:
:)
All essential amino acids
O must be obtained from the foods we eat.
are found in gelatin.
O come from enzymes.
are made in our body.
Answer:
Essential amino acids must be obtained from the foods we eat.
All essential amino acids must be obtained from the foods we eat. Thus, the correct option is A.
What are essential amino acids?An essential amino acid is also known as indispensable amino acid, these are the amino acids which cannot be synthesized from scratch by the organism fast enough to supply its demand in the body, and it must therefore come from the diet an individual eats. Of the 21 amino acids which are common to all life forms, the nine amino acids that humans cannot synthesize include valine, isoleucine, leucine, methionine, phenylalanine, tryptophan, threonine, histidine, and lysine.
Six other amino acids that are considered as conditionally essential in the human diet, meaning that their synthesis can be limited under special pathophysiological circumstances, such as prematurity in the infant or individuals in the severe catabolic distress. These six amino acids are arginine, cysteine, glycine, glutamine, proline, and tyrosine.
Therefore, the correct option is A.
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A hydraulic system uses a(n) ____________________ to transmit pressure.
a.
pulley
c.
transducers
b.
fluid
d.
lever
Please select the best answer from the choices provided
A
B
C
D
Answer:
B. fluid
Explanation:
Uses Pascal's law
Answer:
B, it fluid
it's a liquid the moving and confined space under pressure.
The chart below shows the dates of eclipses in the years 2006 and 2007. What is the
best explanation for the frequency of eclipses?
Date
March 14, 2006
March 29, 2006
September 7, 2006
September 22, 2006
March 3, 2007
March 19, 2007
August 28, 2007
September 11, 2007
Eclipse Type
Lunar, Penumbral
.
Solar, Total
Lunar, Partial
Solar, Annular
Lunar, Total
Solar, Partial
Lunar, Total
Solar, Partial
Where Visible
N. and S. America
S. America, Africa, W. Asia
Europe, Africa, Asia
S. America, Antarctica
Americas, Africa, Europe
Alaska, Asia
Asia, Aus.. Americas
S. America, Antarctica
A. The atmospheric conditions that cause eclipses are only found at certain
locations and times of year.
B. The Moon's orbit is tilted relative to the plane of the Earth's orbit. About every
six months, the Sun, Moon and Earth are aligned enough for a solar and a lunar
eclipse to occur.
C. The Earth and Moon orbit the Sun in opposite directions. When the Moon's
orbit crosses the Earth's orbit, a lunar or solar eclipse will occur.
D. A lunar or a solar eclipse occurs every time the Moon orbits the Earth. The Moon
orbits the Earth four times a year.
Answer:A
Explanation:
can a female get pregnant from more than one guy at once
Answer:
If there is more than on child.
Explanation:
It is possible for twins to have different fathers in a phenomenon called heteropaternal superfecundation, which occurs when two of a woman's eggs are fertilized by sperm from two different men. Ordinarily, a woman becomes pregnant because one of her eggs has been fertilized by sperm.
what would likely to happen if heavy pressure is applied when using a pumice stone on feet?
Answer:
If you apply too much pressure, you can cause redness and abrasions.
The light on the top of the aquarium provides what component of an ecosystem?
A biotic
B producers
C energy
D decomposers
Answer:
A is the answer thanks me later
What phase is represented in the picture below?
Answer:
Interphase
Explanation:
Cells grow and make a copy of the DNA
Please need help with this biology question (photo)
Answer:
Energy flows through the organisms from bottom to top and increases at each level.
Explanation:
Please help, I really need help!
Write the name of the natural disaster next the image below. Then indicate whether it is weather-related or geology-related.
Answer:
Earthquake, and geology-related
Explanation:
I think what they are showing are two tectonic plates that shifted along a fault line.
When a filament of algae is illuminated with light that is passed through a prism, different segments of algae are exposed to different wavelengths of light. When aerobic bacteria are present, they congregate in highest concentrations in the areas illuminated by the red and blue light. These data suggest a relationship between which of the following variables?
a) Wavelength of light and rate of aerobic respiration
b) Wavelength of light and amt of heat released
c) Wavelength of light and the rate of photosynthesis
d) Carbon dioxide concentration and the rate of photosynthesis
Answer:
The correct answer is C) wavelength of light and rate of photosynthesis.
Explanation:
The given question is a famous experiment conducted by T W Engelmann which is called the action spectrum experiment. In this experiment when light passes through a prism it splits into its constituent colors splits into violet, indigo, blue, green, yellow, orange and red.
Aerobic bacteria require oxygen for their survival. The green algae produce oxygen during photosynthesis. Engelmann released aerobic bacteria to it. it is found that the bacteria accumulated at the blue and red light because photosynthesis and oxygen release were higher there. So, it establishes the relationship between the wavelength of light and photosynthesis.
What causes acid rain? *
A) Erosion
B) Fertilizers used to increase growth rates of plants
C) Hunting
D) Burning of fossil fuels
Answer:
burning of fossil fuels
Explanation:
acid rain is caused by the air pollution from the burning of fossil fuels
What is the most important part in the respiratory system?
The lungs.
The lungs are paired, cone-shaped organs which take up most of the space in our chests, along with the heart. Their role is to take oxygen into the body, which we need for our cells to live and function properly, and to help us get rid of carbon dioxide, which is a waste product.
What is the part of the brain that is located between the brain stem and the temporal lobe?
A. cerebellum
B. occipital lobe
C. parietal lobe
D. frontal lobe
How do helmets protect your head?
a.
By creating a large area to spread out the pressure of a blow to your head.
b.
By focusing the pressure of a blow into a small area.
c.
By creating a vacuum that protects your head.
d.
By creating a pressure gradient that traps energy away from your skull.
Please select the best answer from the choices provided
A
B
C
D
Answer: A
Explanation:
A helmet distributes the impact throughout the entire helmet meaning that the pressure is dispersed within the area
PLZ HELP!!! AG CLASS PLANT SYSTEMS
Which of the following defines viticulture?
A cultivation of stone fruits
B cultivation of apples
C cultivation of grapes
D cultivation of citrus
Answer:
C.Cultivation of grapes
Explanation:
That is correct
Answer:
grapes
Explanation:
no balls
A gardener wanted to know if E-Z fertiliser would be good for his vegetables. He fertilised all his bean plants with E-Z fertiliser but didn’t put any fertiliser on his pepper plants. His beans didn’t do well at all, but he got a good crop of peppers. He concluded that E-Z fertiliser was no good. What are the errors in this experiment? Tick all that apply
A) Not enough subjects
B) Subjects were not similar
C) Conditions were not kept the same
D) The experiment was not reproduced
Answer:
B) Subjects were not similar
The errors in this experiment are: subjects were not similar and conditions were not kept the same. Hence the correct options are B and C.
Subjects were not similar: The gardener used two different types of plants, beans, and peppers, to test the effectiveness of E-Z fertiliser. Beans and peppers have different growth requirements, nutritional needs, and environmental preferences. By using different types of plants as subjects, the experiment introduces variability and makes it difficult to attribute the outcome solely to the fertiliser.
Conditions were not kept the same: The gardener applied E-Z fertiliser to the bean plants but did not provide any fertiliser to the pepper plants. This difference in treatment introduces a significant confounding factor, making it impossible to isolate the effect of the fertiliser on the bean plants' poor performance.
Hence the correct options are B and C.
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Al the following are parts of the cell theory except-
All cell function in unique ways.
All living things are composed of cells.
Cells are the basic units of structure and function in living things.
All cells are produced from other cells.
Other:
Answer:
All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids, They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function.
Explanation:
Which is an example of a vascular flowering seeded plant?
a peach tree
moss
a fern
a horsetail
The energy released by respiration originally came from the sun.
True
Or
False
PLEASE HELP(ALL SILLY ANSWERS WILL BE REPORTED)...
Please Describe in your own words, human ovulation and the menstrual cycle. Make sure to include the hormones involved and what actions they trigger. Talk about what happens if an egg is fertilized or not.
Please help
Answer:
Heyyyyy, use https://www.bartleby.com/ it has helped me out a lot & has literally saved my grades. Its actual tutors/teachers who answer your questions in about 30 minutes !!!!!!!!
those in agriculture industry need to be particularly mindful of safety because why?
Answer:
Many hazards are present in the farm. If the farmers are not aware of these hazards these may cause injury to their body or may cause diseases and even death. Farmer should always apply appropriate safety measures while working in the farm.
Explanation:
2. According to the psychiatrist, what is Bill Nye obsessed with?
Answer: SCIENCE
Explanation:
BILL NYE THE SCIENCE GUY! BILL BILL BILL BILL
I’ll give points + brainalist (:
Your answer would be C. because the rest of potential energy. This one is not stored energy, it's kinetic.
Hope this helps; have a great day!
Answer:
Dang- u got all the easy work but its C..
Explanation:
An animal has 2 genes: 1 for tail length (T) and 1 for head shape (H). Its genotype is TtHh. What are all of the possible gametes that this organism can make?
Answer:
TH, Th, tH, th
Explanation:
This question involves two genes; one coding for tail length and the other for head shape. According to this question, an organism has the genotype: TtHh.
In accordance to the law of independent assortment, which states that alleles of one gene will segregate independently of one another. The meiotic division of the organism, will occur in such a way that only one allele of each gene is present in any GAMETE.
The possible gametes for the genotype: TtHh are: TH, Th, tH, th
Which of the following is NOT true about Earth’s systems? A.Together, the the geosphere, hydrosphere, atmosphere, and biosphere work to support life on planet Earth. B. Our atmosphere is the place that holds our oxygen. C. There are many systems, or, parts, that work independently. D. There are many , systems, or parts, of the Earth that work together.
Answer:
d
Explanation:
because each part and system as individual tasks or ways to help the earth
The statement that is not true is that there are many systems, or, parts, that work independently. The correct option is C.
What is Earth's system?The application of systems science to the Earth is known as earth system science. It focuses on interactions and 'feedbacks' in particular.
The five Earth systems interact to create the environments we are familiar with.
Everything in the Earth's system can be classified as either land, water, living things, or air. These four components of the system are referred to as "spheres."
They are the "lithosphere" (land), the "hydrosphere" (water), the "biosphere" (living things), and the "atmosphere" (air).
The geosphere is split up into four subsystems: the lithosphere, hydrosphere, cryosphere, and atmosphere.
Because these subsystems interact with one another and with the biosphere, they work together to influence the climate, trigger geological processes, and influence life on Earth.
Thus, the correct option is C.
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which of the following does not take place in the mouth
Answer:
I. sorry but I didn't see options.