Human skin comes in a variety of
shades, from pinkish white to dark
brown. How did this variation arise?

Answers

Answer 1

Answer:

Based on everything that you have learned so far, provide an explanation for how the different shades of skin color from pinkish white to dark brown evolved throughout human history. Darker skin colors evolved because they provided increased fitness in early human populations living in equatorial Africa.

Explanation:


Related Questions

Using the picture below, what is the BEST question that a student could ask that would help determine which aquatic biome this is depicting?

A.
Does the temperature of the water affect the salinity?

B.
Is there a variation in water pressure throughout the day?

C.
Is there a fluctuation in water salinity throughout the day?

D.
Is there variation in water temperature throughout the day?

Answers

Answer:

Explanation:

Using the picture below, what is the BEST question that a student could ask that would help determine which aquatic biome this is depicting?

A. x

Does the temperature of the water affect the salinity?

B. x

Is there a variation in water pressure throughout the day?

C. x

Is there a fluctuation in water salinity throughout the day?

D. right

Is there variation in water temperature throughout the day?

Can viruses live through mutation and natural selection

Answers

Answer:

sure why not

Explanation:

as the virus mutates, it may increase, or lessen the chance for the virus to survive a battle against its host. like your regular living organisms (though keep in mind viruses are not considered living), some survive and some die due to natural selection and mutation.

I am pretty sure that the answer is yes since viruses have been around for a long time :))

Which factors affect the gravitational force between two objects?

Answers

Answer: The size of each object and the space between them.

When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.

Seeds inside the closed vessel does not give new seeding ,why?​

Answers

Answer:

It is not able to produce a new seedling as it requires sunlight and air to prepare its own food and the process of photosynthesis does not occur. So, the seed inside the closed vessel does not give new seedling.

Explanation:

Answer:

It is not able to produce a new seedling because it needs the sun and air to prepare it's own food and the process of photosynthesis does not occurs

Explanation:

What is structure 1?

Answers

Answer:

Bro give a chart or something not just a question with no info.

Explanation:

Compare and contrast gradualism and punctuated equilibrium. Provide at least one comparison and one difference in your answer. You may use examples for each if that helps you with answering the question.

Answers

Answer:

Gradualism and punctuated equilibrium both are the process of evolution of species over time. However, the gradualism process involves the evolution that occurred slowly, occurring in small periodic changes in the gene pool over a long period of time. Whereas Punctuated equilibrium takes place there are longer periods of apparent stasis interrupted by the sudden change.

They both help in finding the relative change in evolution rate and assist in the study of the anatomical changes occurred during the evolution in different kind of animals or organisms.

After a fire in a Florida pine forest, new growth occurs. Which process allows this to happen?
A succession
B
competition
С
predation
D
symbiosis

Answers

Answer:A) succession

Explanation:

It is estimated that the world human population reached 3 billion people in 1959 and 6 billion in 1999. Assuming a carrying capacity of 16 billion humans, write and solve the differential equation for Gompertz growth, and determine what year the population reached 7 billion. Was logistic growth or Gompertz growth more accurate, considering world population reached 7 billion on October 31,2011

Answers

Answer:

i ) Gompertz equation :

[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]

ii) The year that population reaches 7 billion is 2013

iii) The logistic growth was more accurate

Explanation:

i) write and solve the differential equation for Gompertz growth

Gompertz equation :

[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]

∝ = growth rate

k ( carrying capacity ) = 16 * 10^9

P(t) = population at time t

ii) Determine what year the population reached 7 billion

The year that population reaches 7 billion is 2013

solution attached below

iii) Determine if logistic growth or Gompertz growth was more accurate  considering world population reached 7 billion on October 31,2011

The logistic growth was more accurate because the when Logistic growth model was used, the year in which the population reached 7 billion was 2010 and this value is more closer to 7 billion on October 31 2011 ( given value )

which of the following describes photosynthesis?

the plant take in oxygen, water, and nutrients to make food for humans
the plant gets rid of carbon dioxide as a waste product
the plant takes in carbon dioxide, water, and sunlight to make food for itself
the plant reproduces in the chloroplast

Answers

Answer:

Explanation:

the plant takes in carbon dioxide, water, and sunlight to make food for itself.

What is an antiviral drug? Why is it different from an antibiotic?

Answers

Answer: Unlike most antibiotics, antiviral drugs do not destroy their target pathogen; instead they inhibit its development.

What is a pill bugs habitat

Answers

Answer:

The pillbug's main habitat is under mulch, fallen leaves, and rocks. Pillbugs are nocturnal and require humid conditions during the day. Pillbugs are generally found in soil with sowbugs, millipedes, and earthworms. Their preferred soil habitat is composed of organic matter and has a neutral to alkaline pH.

How is the food you choose to eat used to create energy? referring to cellular respiration

Answers

Answer:

Through the process of cellular respiration, 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.

The Venn diagram provided compares and contrasts two domains of living things. Both domains include species of
bacteria. Select ALL of the terms which could be applied to only group A in the diagram.
A)
ancient
B)
unicellular
may be pathogenic
D)
live everywhere in the environment
E)
cell wall is made of peptidoglycan

Answers

Answer:

C,D,E

Explanation:

i just did it and got them right.Hope this helps :}

This group of Bacteria can be pathogenic, ubiquitous in the environment whose cell walls are composed of peptidoglycan. So, the correct options are C, D and E.

What is Bacteria?

Bacteria are defined as ubiquitous, mostly free-living organisms that contain a single biological cell that constitute a large domain of prokaryotic microorganisms. Bacteria are a few micrometers in length that were among the first life forms to appear on Earth, and are present in most of its habitats.

Some bacteria are harmful that serve a useful purpose that support many forms of life, both plant and animal, and are used in industrial and medicinal processes. This group A mentioned in the above example of Bacteria can be pathogenic, ubiquitous in the environment whose cell walls are composed of peptidoglycan.

So, the correct options are C, D and E.

Learn more about Bacteria, here:

https://brainly.com/question/8008968

#SPJ5

Why is family history thought to be important and a good predictor of an individual’s disease risk factor?

Because family members most closely represent the unique genomic (DNA) and environmental interactions that individuals experience

Because doctors can determine your family’s risk from your ailments

It is important to know family history so that a doctor can issue the right antibiotic to prevent cancer

So that doctors can know how your 1 st line of defense reacts to antibiotics mi

Answers

Answer:

The first answer, Because family members most closely represent the unique genomic (DNA) and environmental interactions that individuals experience. Is right

Explanation:

Do you think humans would be
as dominant if the dinosaurs
were still present?

Answers

Answer:

Probably not, as we might have evolved to become prey instead of predator

Answer:

i dont think so.

Explanation:

the dinosaurs would've already ate us, and crushed the cities. dinosaurs are too dangerous for us. especially the T-rex.

D
Question 2
1 pts
Because the ANS is a visceral motor system, afferent pathways are of no importance
and actually are rarely found.
True
False​

Answers

Answer:

The correct answer is - false.

Explanation:

The ANS is a system consider as the visceral motor system, however, the afferent pathways are the system that is used to flow the signals to the control center from taking from the receptor and are very essential for the homeostasis communication of the nervous system.

This pathway involves the neurons with the signals to the spinal cord and the brain as sensory data. This pathway is very common to provide communication between the receptor and spinal cord.

10. What is an entomologist?

Answers

Answer:

An entomologist is a person who studies, or is an expert in the branch of zoology. (A branch in zoology concerned with insects.)

Explanation:

GIVING BRAINLIEST ANSWER CORRECTLY FOR 40 POINTS
List 3 people from the history of biotechnology and write one sentence about each persons contribution​

Answers

Answer:

Karl Ereky

Explanation:

He discovered it

when was Nigeria amalgamated?​

Answers

Answer:

January 1, 1914,

Explanation:

What does it mean for a virus to "infect" a cell?
Tir
11
The virus lands on the outside of the cell and remains there until the cell produces more viruses.
The virus lands on the outside of the cell and eats proteins on the surface of the cell.
The virus lands on the outside of the cell and injects its genetic material into the cell.
The virus lands on the outside of the cell and injects its proteins into the cell.

Answers

Answer:

I think the answer is...

the virus lands on the outside of the cell and injects its genetic material into the cells  

i'm not sure but this is what I think...

Explanation:

Viruses usually inject their all genetic material into one cell to individual virion contains multiple copies of its fusion protein.

PLSSS ANSWER NOWWW
why is the mitochondria and the brain alike?

Answers

Answer:

Both control

Explanation:

Brain controls the body while mitochondria controls the cell

What is biomass burned to produce

Answers

Answer:

Burning either fossil fuels or biomass releases carbon dioxide (CO2), a greenhouse gas. However, the plants that are the source of biomass for energy capture almost the same amount of CO2 through photosynthesis while growing as is released when biomass is burned, which can make biomass a carbon-neutral energy source.

What are the three main differences between active transport and passive transport?

Answers

Answer:

i hope this helps : )

Explanation:

This act was signed into law on August 6, 1965, by President Lyndon Johnson. It outlawed the discriminatory voting practices adopted in many southern states after the Civil War, including literacy tests as a prerequisite to voting.

Need help with this will make brainliest if right
Research on the different thermal conductivities of different materials. From the different values of the thermal conductivities give seven example of conductors and seven example of insulators

Answers

Answer:

conductors are like silver, gold, copper, steel, sea water, and iron. insulators are rubber, glass, oil, diamond, dry wood, and insulation.

Explanation:

Leaves of a healthy potted plant were coated with Vaseline to block stomata. Will this plant remain healthy for long? State three reasons for your answer.​

Answers

➜ If waxy coating is made on the surface of leaf, loss of water in the form of water vapour does not take place. Even the gaseous exchange will not take place. So, photosynthesis will either be reduced or will not take place.

The plant will not remain healthy for long because:

[i] Exchange of gases will not take place.

[ii] Photosynthesis will either be reduced or will not take place due to lack of CO2.

[iii] Transpiration will not take place, so there will be no mechanism of cooling in hot weather.

Please help!!!! 20 points

Answers

Answer:

Producers: Leaves and the other plant thing (i don't know the name of it)

First-level consumers: Squirrel, grasshopper, rabbit, rat

Second-level consumers: Frog, rat

Third-level consumers: Fox, owl, snake

Herbivores: Grasshopper, rabbit, squirrel

Carnivores: Frog, fox, snake, owl

Omnivores: Rat

correct answers only please!

Answers

It’s B I’m 99% sure lol

Details are underlated or irrelevant details to the topic at hand

Answers

extraneous!!!!!!!! no cap

An individual with two different alleles for the same gene is
called

Answers

Answer:

an individual with two same alleles genes is called a heterozygous

a plane mirror is useful for seeing

Answers

Oh.... very nice! Yes seeing is nice
Other Questions
Brainiest if correct please help Why did the north win? Please write a small paragraph explaining why:) explain why do nations tradeanswer in 2 sentences Please help me find the answer ASAP identify the type of solution (Hypotonic, Isotonic and Hypertonic) in each of the beakers. Write your answers as A=..., B=..., C=... Can someone help me! please answer all the questions for 25 points and for brainliest if not answer correctly will report A pet sitter charges $84 for eight hours of work at this rate how much does the pet Sitter charge for seven hours of work? The owner of a chicken processing plant makes $1,000,000 per year from his chicken processing plant, and $1,000,000 per year from other sources. He notices that a total of $30,000 worth of chickens per year are being taken home by his 100 employees to supplement their minimum wage living standards (this works out to less than $6 per week per employee). These chickens are being taken out through the fire safety doors, so the owner is considering blocking the doors permanently. This is against the law because any reasonable person knows that sealing fire doors kills people in the event of a fire. The probability of a fire is 0.01 per year (one percent per year). If a fire breaks out it will be discovered that the owner sealed the safety doors, and the owner will have to pay $F = 700, 000 worth of fines and legal fees. The owner's von NeumannMorgenstern utility function is u(x) = x where x is the owner's income in a given year. The owner cares only about x. What do Cuba and Brazil have in common?Your answer:The majority of tourists in both nations are from the United States.The dominant language in both countries is Spanish.Because of location, both countries have a tropical climate. Calculate the surface area.Thank you for the helpi will mark brainiest PLEEEEEEASE HELPPPPPP Mason is laying tiles on his entryway. The tiles are each 2/9 feet long, and the entryway is 7 1/2 feet long. How many tiles will Mason need to buy in order to cover the length of the entryway? Explain. Peters teacher says he may have his report card percentage based on either the mean or the median and he can drop one test score if he chooses. 84%, 71%, 64%, 90%, 75%, 44%, 98% Which measure of center should Peter choose so he can have the highest percentage possible? Peter should choose the mean after dropping one test score. Peter should choose the mean without dropping one test score. Peter should choose the median after dropping one test score. Peter should choose the median without dropping one test score. A TV has an original price of $499. Find the new price of the TV after a 10% increase. what are the pros and cons of being a planetary geologist? Sometimes a population cannot grow to its biotic potential due to environmental conditions called ____________.a. extinctionb. carrying capacitiesc. limiting factorsd. emigration How does computer hardware and software work together? If 30 is split between two people inthe ratio 3:2, what does each get? A change resulting in one or more new substances being formed is a?A. nuclear reactionB.physical propertyC. chemical changeD.physical change