There are four mechanisms that can cause changes in the frequencies of genes in populations: mutation, migration, genetic drift, and natural selection. All four are mechanisms of evolutionary change. What is genetic drift?
A) In a population, it is the changes in allelic frequencies of a gene that are due to chance.
B) A random error/change in the DNA sequence. These may be inherited or occur in cells during the lifetime of the organism
C) Also known as gene flow. It is any movement of individuals and/or the genetic material they carry, from one population to another.
D) There is variation in any population differential reproduction occurs and over time a more advantageous trait exists in the population.​

Answers

Answer 1

Answer: D

Explanation: i did it on usa test prep

Answer 2

Answer:D

Explanation:


Related Questions

I need the anwser soon!!Which two statements describe what happens to energy during cellular
respiration?
O A Chemical energy is transferred to molecules of ATP and used to
carry out fe processes.
B. Some thermal energy is transformed into chemical energy-
C. Some chemical energy is transformed into thermal energy
D. Light energy is transferred to molecules of ATP and used to carry
out te processes

Answers

Answer:

the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.

Explanation:

On a scratch sheet of paper, complete the Punnett square of the cross between two heterozygous red-eyed flies (Rr). What color eyes will the offspring have?

Answers

Answer:

75% red, 25% other color (brown?)

Explanation:

A cross between two heterozygous red eye flies (Rr x Rr)

                     R                     r

R                  RR                   Rr

r                   Rr                   rr

The possible genotypes are RR, Rr, and rr. There are two possibilities of Rr.

Since the heterozygotes have red eyes, the red eye allele must be dominant. Therefore, RR and Rr genotypes will all have red eyes. That means 3/4 (75%) of offspring will have red eyes. 1/4 25% are h0m0zygous recessive (rr), and will therefore have the other eye color (question doesn't mention which colour this is, it is likely brown)

have this done correctly for brainiest​

Answers

LABELING

From Top to bottom

1) Ocular lens (Eye Piece)

__________________________________________________________

First Row Of the Labeling

2) Arms ( Right Box)

3) Revolving Nose Piece (left Box)

__________________________________________________________

Second Row Of the Labeling

4) Stage Clip (Right Box)

5) Objective Lenses (Left box)

__________________________________________________________

The Knobs in the Right

6) Course Focus Knob (the big Knob)

7) Fine Focus Knob (the small knob)

8) Mechanical Stage adjustment knobs (Small circular knobs in front of the course focus and fine focus knob)

__________________________________________________________

The Left Labeling below the objective lens

9) Stage

10) Condensor Lens

11) lamp or Illuminator

__________________________________________________________

Right Bottom 2 Labeling

12) Brightness adjustment

13) Base

__________________________________________________________

Functions

A) OCULAR LENS

B) MECHANICAL STAGE KNOBS

C) FOCUS KNOBS

D) MECHANICAL STAGE

E) STAGE CLIP

F) CONDENSOR LENS

G) LOW POWER OBJECTIVE LENS

H) BASE AND ARM

I) DIAPHRAGM

J) COARSE FOCUS KNOB

K) ILUMINATOR OR LAMP

L) HIGH POWER OBJECTIVE LENS

PLZ HURRY

Use the information from the article to answer the question.

Meteors

Which statements apply to meteors?

Meteors are bits of material falling through Earth's atmosphere.
Meteor showers are associated with asteroids.
Meteors create a streak of light.
The largest meteor found has a mass of 54,000 kg.
Meteor showers occur in the autumn and winter.

Answers

Answer:

Meteors are bits of material falling through Earth's atmosphere

Meteors create a streak of light

While meteors are associated w asteroids, meteor showers are more associated with comets

Meteor showers can occur when ever but there are annual showers that will occur ea yr

Answer:

1.Meteors are bits of material falling through Earth's atmosphere.

3.Meteors create a streak of light.

Explanation:

TRUST ME

The smallest particle of an element is an atom?

Answers

Answer:

Yes, Atoms are the smallest particle an element can be.

PLZZZZ HELPPPP!!


_____ are strands of DNA that are bundled up tightly containing proteins that create genes.

Answers

Answer:

chromatids

Explanation:

Answer:

chromosomes are strands of dna

Can somebody please help me label this map please!!!!

Answers

It seems like this reference picture might help you.

Which statement provides the STRONGEST evidence in support of the scientists argument?

Answers

If there’s a picture I can’t see it

What do producers use the sun's energy for?
a.) to reproduce
b.) to grow
c.) both a and b

Answers

Answer:

its both a and b

Explanation:

ballsack

Both a and b. Without the sun, producers wouldn’t be able to reproduce and also grow.

Which of the following fur colors are possible males? Choose all that apply Remember that the gene for white spots is on an autosome, and the gene on the X chromosome .

Answers

The fur colors which are possible are black, black and white, orange, orange and white.

What do you mean Autosome?

An autosome may be defined as the gene in question is located on one of the numbered, or non-gender, chromosomes.

Here, the S genes for white spots are located on an autosome, while the O genes are located on the X chromosome. Hence, the resulting offspring possess the fur colors of black, white, and orange.

Therefore, the fur colors which are possible are black, black and white, orange, orange and white.

To learn more about Autosome and X chromosome, refer to the link:

https://brainly.com/question/296477

The fur colours which might be viable are black, black and white, orange, orange and white.

Here, the S genes for white spots are positioned on an autosome, whilst the O genes are positioned at the X chromosome. Hence, the ensuing offspring own the fur colours of black white, and orange.

What do you suggest Autosome?

An autosome can be described because the gene in query is positioned on one of the numbered, or non-gender, chromosomes.

Therefore, the fur colours which might be viable are black, black and white, orange, orange and white.

To analyze greater approximately Autosome and X chromosome, consult with the link:

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The number of_____in the nucleus is also known as the____number. ​

Answers

Answer:

The mass number also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.

Answer:

The number of Protons and Neutrons in the nucleus is also known as the Covalent bonds.

Hope I helped!

Write two differences between the unicellular and multicellular organisms.

Answers

Explanation:

Unicellular organisms contain one cell and all of their functions are based on that one cell whereas multicellular organisms contain more than one cell and there functions are divided amongst different cells like nervous cells, cardiac muscle cells etc..

Unicellular organisms are composed of a single cellMulticellular organisms are composed of more than one cellSimple body organizationComplex body organizationA single cell carries out all necessary life processesMultiple cells perform different functionsThe total cell body is exposed to the environmentOnly the outer cells are exposed to the environmentDivision of labour is at the organelle levelDivision of labour is at cellular, tissue, organs and organ system levelIncludes both eukaryotes and prokaryotesIncludes only eukaryotes

How do you know something is dead

Answers

Is this without equipment?

Depending on what organism you are talking about, animals that can be seen with the unaided eye you can tell that they are dead by studying their bodily movements such as the rise or falling of their chest.

Plants with the unaided eye, the best  indicator is to take a branch or piece off and study the insides color, if it is green then mostly likely they are alive.

Now microscopic organisms are harder to say, it depends on what you are referring to.

The product of force and displacement is_________.​

Answers

I think it should be “work”

The product of force and displacement is “work”

Hope this helps you:))

What is the difference between the tissue and the organ?

Answers

Answer:

A group of cells working together is defined as a tissue and several tissues working together comprise an organ. ... The heart is used as an example of an organ which is made up from muscle and valve tissue.

Explanation:

Which statement accurately describes the energy needs for photosynthesis and cellular respiration

Answers

photosynthesis uses solar energy to convert inorganics to energy-rich organics; respiration breaks down energy-rich organics to synthesize (hoping that helps)

Answer:

Solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration.

Explanation:

I WILL GIVE BRAINLIEST Pretend you're riding the bus to school on a very cold and snowy day. List 3 different phases changes you might see along the way.

Answers

If you’re talking about scientific phases you will see
1. precipitation(the snow falling)
2. evaporation(water turning into vapor)
3.melting(snow turning the water)

While riding the bus to school on a very cold and snowy day three different phases changes you might see along the way are mentioned below:

1. precipitation(the snow falling)

2. evaporation(water turning into vapor)

3. melting(snow turning the water)

What is precipitation, evaporation, and melting?

Evaporation is the process in which liquid changes in vapour or gas and it can be easily observed during hot summer days when there is raining and when wet clothes dry in the presence of sunlight. Evaporation is directly proportional to temperature and when rate of evaporation increases the temperature also increases.

Precipitation is the water that is falling from the sky and it occurs when a portion of atmosphere becomes saturated with water vapour.

Melting is the process in which solid is converted into liquid like ice cube converted into liquid water and this is one of the example of melting.

Therefore, the mentioned below are three phases changes :

1. precipitation(the snow falling)

2. evaporation(water turning into vapor)

3. melting(snow turning the water)

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Which phrase describes elevation?

the height of a feature above sea level
the distance of a feature above the clouds
the distance above the lowest point in the area
the height of a feature above the nearest mountaintop

Answers

pretty sure it’s “the distance above the lowest point in the area”

Answer:The height above sea level

Explanation: just did it

Question
Type the correct answer in the box. Use numerals instead of words,
There are an estimated 12,600 spiders in a region of 525 square meters. How many spiders are there per square meter

Answers

Answer:

24

Explanation:

The population density of spiders is found by dividing the population size by the total area that the population occupies.

Answer:

Plato and Edmentum

Explanation:


What is the elevation for points
A
B
C
D
X

Answers

Answer:

The highest elevation would be x the lowest would be c

A scientist conducted a study of an organism and found that its body cells contained 40 chromosomes. While conducting her observations, the scientist noticed that the cells were undergoing cell division. What difference would the scientist expect to observe between the body cells and the sex cells of the organism as they underwent cell division?
Body cells divide by mitosis for the growth and repair of cells, while sex cells divide by meiosis for sexual reproduction.


Body cells divide by mitosis for sexual reproduction, while sex cells divide by meiosis for the growth and repair of cells.


Body cells divide by meiosis for the growth and repair of cells, while sex cells divide by mitosis for sexual reproduction.


Body cells divide by meiosis for sexual reproduction, while sex cells divide by mitosis for the growth and repair of cells.

Answers

Answer:

The difference that the scientist would expect to see between body cells and sex cells with respect to cell division is that body cells divide by mitosis for the growth and repair of cells, while sex cells divide by meiosis for sexual reproduction.

Explanation:

The behavior of the different cell types with respect to their division depends on the functions that each type has.

Somatic cells are those that define the structure and function of the organism, forming tissues by binding together. The process of mitotic division —to obtain from an original cell two identical daughter cells— is important for the growth, development and repair of an individual's tissues.Sex cells or gametes have half of the chromosomal charge —they divide by meiosis, a reductive cell division— and are involved in the process of sexual reproduction.

    The characteristics described for each cell type explain why the other options are not correct.

Answer:

Body cells divide by mitosis for the growth and repair of cells, while sex cells divide by meiosis for sexual reproduction.

Explanation:

How are P waves and S waves alike?


A.)They twist and distort solid objects


B.)They are both fictional particles


C.)They travel in the same manner


D.)They travel through solids

Answers

Answer:

I think the answer is D.

Which organelle that plays a central role in the transport of new molecules from inside to outside the cell?

Answers

Answer:

The Golgi apparatus plays a central role in molecular transport after biosynthesis.

Explanation:

Transcription occurs in the nucleus during protein synthesis, followed by translation inside ribosomes. Then, new molecules join the endoplasmic reticulum to be folded and modified. In the Golgi, they are tagged and separated into lysosomes for export outside the cell.

 The Golgi system comprises of several regions known as cisternae; they act as independent microenvironments where products requiring their own unique conditions are converted into new, stable biomolecules.

Binding of ________________ to receptors (ligand-gated) on the sarcolemma at the neuromuscular junction is vital for depolarization of the muscle fiber.

Answers

Answer:

Binding of   ACh (acetylcholine)    to receptors (ligand-gated) on the sarcolemma at the neuromuscular junction is vital for depolarization of the muscle fiber.

Explanation:

It allows acetylcholine to be released into this synapse when an action potential hits a neuromuscular junction. Acetylcholine attaches to the nicotinic receptors localized on the post-synaptic membrane of the muscle fibre's motor end plate, a specialized region.

Hence , the answer is  ACh (acetylcholine) .

Removing a specific group of trees within a small area over a long period of time is
a. clearcutting
b. seed tree cutting
C. group selection
d. single tree selection

Answers

Answer:

C. group

Explanation:

Removing a specific group of trees within a small area over a long period of time is group selection. The correct option is C.

What is group selection?

A quantitative definition of group selection is when the average group fitness is greater or less than the mean of the fitness values of the individual members.

Another definition of group selection is when features evolve in accordance with the fitness (survival and reproductive success) of groups.

The conclusion was that although group selection is theoretically feasible, in practice it almost always favors one group over another.

Group selection is the long-term removal of a certain group of trees in a constrained region. In a clearcut, all the trees in a specific region are taken out at once.

The removal of shelterwood cutting clears an area's also clears land cleared for shelterwood cutting, which also involves cutting downing shelterwood cutting, but it is a completes a method of clearing

Thus, the correct option is C.

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Why was the Cherokee writing system important?

Answers

Answer:Cherokee was one of the first American Indian languages to have a system of writing devised for it—a syllabary, so called because each of the graphic symbols represents a syllable.

Explanation:

Cherokee was one of the first American Indian languages to have a system of writing devised for it—a syllabary, so called because each of the graphic symbols represents a syllable.

How many chromosomes will be found in
each of the two new cells formed as a result
of mitotic cell division?

Answers

At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.

23 pairs of chromosomes will be found in each of the two new cells formed as a result of mitotic cell division.

WHAT IS MITOSIS:

Mitosis is a kind of cell division that results in the formation of two daughter cells with the same number of chromosomes as the parent cell.

Mitosis is used for growth and tissue repair in living organisms. In mitosis, a parent cell divides into two new daughter cells, however, each cell possess the same number of chromosomes as the parent.

In a somatic human cell, there are 23 pairs of chromosomes (46 chromosomes). If this cell undergoes mitotic division, then, there will be 23 pairs of chromosomes in each cell formed.

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What is the “self”? When we say “myself” or “yourself” what are we referring to?

Answers

Answer:

when you say self you are to the body, so when you say myself you are basically saying my body, my awereness.  And when you say yourself  it means their body.

Explanation:

Answer:

yourself is said to another person and you say yourself mean you and my self also means you but not used the same way.

Explanation:

hope this helps.

Glad to help

Match the behavior type with the corresponding action.

1. migration
reflex
2. putting a puzzle together
conditional response
3. getting hungry before lunch time
instinct
4. brushing your hair
trial and error
5. eye blinking
habit

Answers

Answer:

instinct=migration

trial and error=putting a puzzle together

conditional response=getting hungry before lunch time

habit=brushing your hair

reflex=eye blinking

I hope this helped and was explained better

The behavior type of response with the corresponding action is instinct-migration, trial and error-putting a puzzle together, conditional response-getting hungry before lunchtime, habit-brushing your hair, and reflex-eye blinking.

What is the corresponding action?

The brain control action is regulated by the body some are involuntary and others are voluntary it creates a rhythm in our body to make the system regulate.

Migration is instinct but putting puzzle is a trial and error condition, when the eye is blinked is a reflex action, and crushing your hair is a habit while getting hungry before lunchtime is a conditional response.

All the action of the body is controlled by the body's action some signals are sent to the body to regulate every action to control conditional response or habit.

Therefore instinct-migration, trial and error-putting a puzzle together, conditional response-getting hungry before lunchtime, habit-brushing your hair, and reflex-eye blinking.

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Imagine that a biological anthropologist 10,000 years in the future is examining our fossil remains. The anthropologist notices that humans have broad incisors and molars with rounded cusps. How do you think the anthropologist would interpret these traits---what diet would these traits indicate

Answers

Answer:

They were frugivores

Explanation:

Frugivores are animals that mainly eat raw fruits, vegetables, roots, seeds, shoots, etc. Frugivores need to eat diverse fruits and succulent fruit-like vegetables to fulfill their nutritional requirements, although they can supplement this diet with flowers, nectar, small insects, etc. Among their adaptations for fruit consumption, frugivore teeth are clearly distinct, having broad incisors to peel tough fruit rinds. Moreover, these animals generally have long small intestines to digest the fruit.

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