describe chalenges related with a molecular clock​

Answers

Answer 1

Answer:

Issues with the Molecular Clock

Though most changes occur at a constant rate, the rate of change may vary in different genes, at different times, and among different organisms.

Explanation:

Issues with the Molecular Clock

Though most changes occur at a constant rate, the rate of change may vary in different genes, at different times, and among different organisms.


Related Questions

being boy i have a girlish voice . i am very sad and feel losing my confidence please help​

Answers

Answer:

Hey it doesn't matter how you are ,how you talk

Explanation:

what matters is your personality,

And don't care what others say ,just be how you are,be what you want to be

Answer:

It doesn't matter what you sound like, so don't stress too much. It's who you are, be proud of it. Don't let anyone make you think otherwise.

Explanation:

Question 11 of 30
What kind of energy powers photosynthesis?
O A. Solar energy
B. Kinetic energy
O C. Electrical energy
D. Chemical energy
SUBMI

Answers

Answer:

solar energy

Explanation:

solar energy

Assuming that the motion of the object remains the same, at what position will the object be when it had traveled for a total of 6 s?
A. 2 m
B. 0 m
C. 1 m
D. 5m

Answers

Answer:

B. 0 m

Explanation:

From the position - time graph, the object would have traveled a distance of 0m after 6s.

The graph shows a decrease in distance traveled with increasing time.

the y - axis is the position of the body the x - axis is the the time taken

If we trace up the time taken to the curve, the position will be 0m.

Therefore, the position of the body after 6s is at 0m.

why is the small intestine important​

Answers

The small intestine carries out most of the digestive process, absorbing almost all of the nutrients you get from foods into your bloodstream. The walls of the small intestine make digestive juices, or enzymes, that work together with enzymes from the liver and pancreas to do this.

using realistic science examples, explain how you would improve a cats litter box??

Answers

Answer:

Sir yes

Explanation:

Etc

Question 10 ot 25
The practice of science can answer only scientific questions. And scientific
questions guide the design of investigations. What is usually true of the
possible answers to a scientific question?
OA. They can lead to additional questions about the phenomenon.
OB. They overturn an established scientific theory.
OC. They lead to the discovery of a new scientific law.
OD. They remove the need for further scientific inquiry.

Answers

Answer:

B. they can overturn. an established scientific theory

Answer:They can lead to additional questions about the phenomenon

Explanation:

Which option supports the decision to file an Animal Waste Management Plan (AWMP) with the state in the following scenario?

Yolanda wants to open a small-scale dairy farm in New Jersey. She plans to have 10 cows and 8 goats.
Animal farming operations of any size must file an AWMP.
Any farm operation with more than 10 animals must file an AWMP.
Her acreage size makes it a feeding operation, requiring an AWMP.
The animals she has meet the minimum weight criterion for an AWMP.

Answers

Answer:

Her acreage size makes it a feeding operation, requiring an AWMP.

Explanation:

Animal Waste Management Plan (AWMP) is a plan filed by farm owners on how the intend to manage the wastes that would be generated in their various farm.

This plan is filed with the state management board and leads to periodic visit to the farm in-order to ensure that, the farm owners are sticking to the plans which they enumerated earlier on how they are going to manage those wastes


Which is a viable way to combat the effects of drought on the population of Sub-Saharan Africa?
A)
seeding the clouds
B)
increasing irrigation
C. increasing livestock
D)
planting many trees
H

Answers

Answer:

i am not that smart but think it's C

Explanation:

NEED HELP WITH HOMEWORK!!!
The mutation that causes sickle cell is:
1. deletion
2. Addition
3. substitution
4.Unpoint

Answers

Sickle cell disease is caused by a mutation in the hemoglobin-Beta Gene found in a chromosome 11. Hemoglobin transports oxygen from the lungs to other parts of the body. Red blood cells with normal hemoglobin (hemoglobin A) are smooth and round and glide through blood vessels.

Briefly explain why it is difficult to determine the age of our planet.

Answers

Answer:

It is difficult to determine the age of our planet because the time this accretion process took is not yet known and predictions from different accretion models range from a few million up to about 100 million years

Lots of points plz help

Answers

1. C
2. A
3. B
Hope this helps
i think it is c,b,a. can you please mark me the brainliest. have a great day and good luck with school

If the desert experiences a prolonged drought where many of the plants die, which BEST predicts the effect on the carrying capacity of the ecosystem?

A
The carrying capacity of the ecosystem will increase because there will be more space available for organisms.
B
The carrying capacity of the ecosystem will increase because there will be fewer organisms that require resources.
C
The carrying capacity of the ecosystem will decrease because there will be less food available for many organisms.
D
The carrying capacity of the ecosystem will decrease because there will be fewer organisms competing for resources.

Answers

Answer:

c

Explanation:

there will be way less vegetation to attract pet and many organisms will die because of the lack of resources due to the drought

If the desert experiences a prolonged drought where many of the plants die, the carrying capacity of the ecosystem will decrease because there will be less food available for many organisms.

What is ecosystem?"An ecosystem consists of all the organisms and the physical environment with which they interact."What do you man by carrying capacity?"The carrying capacity is the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available."

Due to draught, resources decreases (resources becomes limited) and many organisms would die because of starvation. This would also effect in the food chain of other organisms. The organism would now compete for the lesser amount of resource.

Hence, the correct option is C. The carrying capacity of the ecosystem will decrease because there will be less food available for many organisms.

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Determine which of the following choices is the best match for the questions that follow: A. Whole-organism Vaccine B. Subunit Vaccine C. Toxoid Vaccine D. Experimental Vaccine

Answers

Answer:

Experimental Vaccine Herpes Vaccine = D

Attenuated = B

Purified macromolecule Vaccine = B

Recombinant-Vector Vaccine  = A

Inactivated or Killed = C

Diphtheria Vaccine = A

Explanation:

A Vaccine is an organic arrangement that gives dynamic obtained invulnerability to a specific irresistible infection. A Vaccine ordinarily contains a specialist that takes after a sickness causing microorganism and is frequently produced using debilitated or executed types of the organism, its poisons, or one of its surface proteins. The specialist invigorates the body's safe framework to perceive the specialist as a danger, pulverize it, and to additionally perceive and decimate any of the microorganisms related with that specialist that it might experience later on.

Vaccines can be prophylactic (to forestall or enhance the impacts of a future contamination by a characteristic or "wild" microorganism), or therapeutic (to battle a sickness that has just happened, for example, cancer).

The administration of Vaccine is called vaccination. vaccination is the best strategy for forestalling irresistible sicknesses

Much of the United States' prairie today:
A) consists of farms and ranches.
B) has gone back to its original condition.
C) changed to desert.
D) has now become urban cities.sc​

Answers

D) has now become urban cities

What are the electrical charges of a proton, neutron and electron?

Answers

Answer:

Protons are positive while nuetrons are negetive.

Expland nation:

PLEASE HELP!
(click on the picture for it to be clear)
have a blessed day.

Answers

Answer:

It should be the first answer choice

Explanation:

Cells in many-celled organisms...

A. All look the same
b. All have the same structure
c. are often quite different from each other
d. are the same size in every part of the organism

Answers

Answer:

c. are often quite different from each other

Explanation:

Multicellular organisms - composed of several different cells: Cells in these organisms differ in relation to the function to be performed.

The cells in these organisms are growing, developing, and reproducing.

The cells differ in shape, size, and role they have in the organism.

In the group of multicellular organisms are animals (Animalia), plants (Plantae), and fungi (Fungi).

Cells in many-celled organisms are often quite different from each other. Therefore option C is correct.

In many-celled organisms, such as animals and plants, cells can be specialized for specific functions, leading to their differentiation and diversification.

Different types of cells have distinct structures and perform specific tasks within the organism.

For example, nerve cells (neurons) are specialized for transmitting electrical signals, muscle cells for contraction, and blood cells for carrying oxygen and nutrients.

This specialization allows for efficient division of labor, where each cell type contributes to the overall functioning of the organism.

The diversity of cell types and their functions is a fundamental aspect of the complex organization and functioning of multicellular organisms, contributing to their overall biological complexity and adaptability.

Therefore option C are often quite different from each other is correct.

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What two substances among four major types of organic compounds are made by living things? A.carbohydrates
B.water
C.proteins
D.potassium

Answers

Answer:

The answer is "Carbohydrate" and "Protein"

Explanation:

A solid eating regimen incorporates protein and starches. Why? Since these mixes are two of the primary structure obstructs that make your body. You get these structure blocks from the food that you eat, and you utilize these structure squares to make the natural mixes important forever.

The principle substance parts of living beings are known as natural mixes. Natural mixes are atoms worked around the component carbon (C). Living things are comprised of exceptionally huge particles.

These huge particles are called macro-molecules since "macro" signifies large; they are made by more modest molecules holding together. Our body gets these more modest particles, the "building blocks" or monomers, of natural atoms from the food we eat.

Answer:

A and C

Explanation:

i took the quiz

True or False: All bacteria that cause an illness like strep throat are genetically identical to each other

Answers

Answer:

False

Explanation:

Consider the following population:

Blood Type A B AB O
Number of individuals 533 84 67 316

What is the frequency of the IB allele in this population?

Answers

Answer:

0.079

Explanation:

Using Hardy Weinberg equilibrium for  blood group;

p² + 2pq + q² + 2pr + r² + 2qr = 1

where;

p = allele frequency for A

q =  allele frequency for B

r =  allele frequency for O

N(p² + 2pr) = the number of allele for type A people

N(q² + 2qr) = the number of allele for type B people

N(2pq) = the number of allele for AB people

N(r²) = the number of allele for O people

N(r²) = 316

r² = 316/1000

r² = 0.316

r = [tex]\sqrt{0.316[/tex]

r =  0.56

To find the frequency of the [tex]I^B[/tex] allele;

N(q² + 2qr) = 84

q² + 2qr = 84/1000

q² + 2qr = 0.084

where;

r = 0.56

q² + 2q(0.56) = 0.084

q² + 1.12q = 0.084

q² + 1.12q - 0.084 = 0

Using the quadratic formula:

[tex]=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}[/tex]

where;

a = 1, b = 1.12, c = -0.084

[tex]=\dfrac{-(1.12) \pm \sqrt{(1.12)^2-4(1)(-0.084)}}{2\times 1}[/tex]

[tex]=\dfrac{-(1.12) \pm \sqrt{1.2544-(-0.336)}}{2}[/tex]

[tex]=\dfrac{-(1.12) \pm \sqrt{1.5904}}{2}[/tex]

[tex]=\dfrac{-(1.12) \pm 1.261}{2}[/tex]

[tex]=\dfrac{-(1.12) + 1.261}{2} \ \ OR \ \ \dfrac{-(1.12) - 1.261}{2}[/tex]

[tex]=\dfrac{0.141}{2} \ \ OR \ \ \dfrac{-2.381}{2}[/tex]

[tex]\simeq 0.079 \ \ OR \ \ -1.1905[/tex]

Since our value can be negative; then the frequency of the  [tex]I^B[/tex] allele in this population is 0.079.

As DNA splits, what is added to the bases on the original strands?*

Answers

Answer:Nucleotide

Explanation:

Which of these events occurs during DNA replication?
DNA polymerase synthesizes a complementary strand from one, but not both of the original
strands.
DNA polymerase synthesizes a complementary strand from each of the original strands.
DNA ligase breaks apart one of the original strands, and other enzymes re-assemble the
components into a new strand,
DNA ligase breaks apart both of the original strands, and other enzymes re-assemble the
components into two new strands.

Answers

Answer:

i think frst one plz i am new so sry if i am wrong

During DNA replication, the DNA polymerase enzyme produces a complemetary strand from each of the original strands.

What is DNA replication?

It is the process by which DNA produces a copy of itself at the time of cell division. In the process of replication, the initial step is the unzipping of the double helix structure of the DNA. This is done with the help of enzyme helicase. The unzipping creates a Y shape composition called replication fork.

Towards the replication fork, one of the strands is oriented in the 3' to 5' direction, known as the leading strand. The other strand in the 5' to 3' direction is the lagging strand, which is away from the replication fork.

The primer combines with the leading strand, and marks the intiation point of the synthesis of DNA. After this, DNA polymerase combines with the leading strand and add complementary nucleotide bases in the 5' to 3' direction.

In the lagging strand, numerous primers come and bind, later the chunks of DNA called Okazaki fragments are supplemented to the lagging strand in the 5' to 3' direction, by the enzyme DNA polymerase. This kind of replication is termed discontinuous as the Okazaki fragments are joined up later.

Thus, the correct statement is the second one, that is,  the DNA polymerase enzyme produces a complemetary strand from each of the original strands.

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V
Which list places different units of matter in the correct sequence from
largest to smallest?
O A. Human body, organs, molecules, atoms, neutrons
B. Human body, molecules, organs, atoms, neutrons
C. Human body, atoms, organs, molecules, neutrons
D. Human body, organs, atoms, molecules, neutrons

Answers

Answer: A

Explanation:

A list that places different units of matter in the correct sequence from largest to smallest is as follows:

The human body, organs, molecules, atoms, and neutrons.

Thus, the correct option for this question is A.

What is Matter?

A matter may be characterized as any substance that significantly possesses mass and takes up space by having volume. It is anything that physically takes up space and can be weighed. In other words, the matter has volume and mass. There are many different substances, or types of matter, in the universe.

The human body is a structure that consists of numerous body systems in order to perform multiple functions for their survival. These body systems may include various organs. Molecules are composed of atoms that have three subatomic particles like electrons, protons, and neutrons.

Therefore, the Human body, organs, molecules, atoms, and neutrons is on the list that places different units of matter in the correct sequence from largest to smallest. Thus, the correct option for this question is A.

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Cars are powered by fossil fuels, which come from the remains of ancient living things that were buried and exposed to high temperature and pressure from Earth’s interior.

Which spheres are represented when fossil fuels form?

A- atmosphere and biosphere
B- biosphere and geosphere
C- cryosphere and atmosphere
D- geosphere and hydrosphere

Answers

Answer:B

Explanation:Ancient living things were part of the biosphere at one point and the geosphere has to do with all of the earth.

Answer: The answer is B- biosphere and geosphere

Explanation: I have my ways ;>

- What is meant by nosocomial infection?​

Answers

Answer:

Hi

Explanation:

A nosocomial infection is contracted because of an infection or toxin that exists in a certain location, such as a hospital. People now use nosocomial infections interchangeably with the terms health-care associated infections (HAIs) and hospital-acquired infections.

nosocomial infection is something toxic around the area that’s infected , places like the hospital, just areas that aren’t clean and have virus

Can water hurt an organism?
Explaing why not or how it can​

Answers

Answer:

Yes, it can hurt one depending on the species, such as land animals having to be in the water for too long, it may drown, but it takes a certain amount of time to do so which means that for the most part, it is harmless.

Hope this helps!

Help Plz! Will give brainliest and for a lot of POINTS!



Which type of feature forms suddenly where intense compression deforms the rock in an area
a. volcano
b. normal fault
c. folded layers
d. reverse fault

Answers

Answer:

option b normal fault

Explanation:

sorry if i' m wrong

Answer:

Its reverse fault

Explanation:

Describe why trasnsitioning to a hydrogen economy has advantages.
PLEASE HELLPPPPP

Answers

Answer:

the benefit of using hydrogen combustion over fossil fuel combustion is that it releases fewer emissions-water is the only major byproduct. No carbon dioxide is emitted, and nitrogen oxides, produced by a reaction with the nitrogen in the air, can be significantly lower than with the combustion of fossil fuels.

Explanation:

shown above

The elimination of pollution caused by fossil fuels - When hydrogen is used in a fuel cell to create power, it is a completely clean technology. The only byproduct is water. ... Distributed production - Hydrogen can be produced anywhere that you have electricity and water.

LOTS OF POINTS!?!?!The first part is just the dissolving of the carbon dioxide and water from groundwater, cloud, or rain making Type Here(H2CO3). FILL IN THE TYPE HERE PART!?!?!?

Answers

what’s the question and what part ?

which other senses used in string telephone other than hearing?

Answers

...... Touchchhhhhhh
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