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DedPeter [7]
2 years ago
11

Human babies have a gene that produces an enzyme that breaks down the sugar found in milk. Over time, this gene is shut off in m

ost adult humans. A mutation in this gene allows some adults to continue to drink milk without discomfort. Why would this mutation have allowed early humans to survive?
A- it provided milk free from bacteria

B- it provided vitamins that could only be produced in milk

C- it provided more cattle that could be raised by early humans.

D- it provided an alternative source of nourishment for early humans.
Biology
1 answer:
DiKsa [7]2 years ago
8 0

Answer:

I think it would be d

Explanation:

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Which of the following behaviors allows a bird to maintain a constant body temperature in extremely hot weather?
patriot [66]
<span>d. All of the above

These behaviors;

Spreading wings
Flattening feathers
panting

are all evolutionary process to maintain body temperature. Birds are warm-blooded animals. Also known as </span><span>homeotherms, which is defined as having the constant body temperature. This is a vital function for the survival of the specie.
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<span>c. are hollow
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The bones of most birds are hollow in order for the weight of the birds to be light for them to fly. 
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3 years ago
_________ are chemicals nonhumans secrete into the environment that produce a reaction in other members of the same species, per
irina [24]
The Answer: pheromones
3 0
2 years ago
Place the following materials in the order in which they are likely to fossilize. Begin with the material that is most likely to
marusya05 [52]

Answer: correct order--->

1)mammal teeth

2.)bones of an adult mammal quickly buried

3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Explanation:

Fossilization is the ability of an organism to be preserved and remain unaltered for a very long time. Through research , it has been found out that Harder  parts of the body tend to remain preserved for a long time  because they  naturally have minerals deposited in them and may only be reduced,  but the softer part or tissues do not get preserved for a long time because being made up of polymer can be disintegrated easily by natural biological and physical processes.

The order of which material will likely fossilize is

1.)mammal teeth

2.)bones of an adult mammal quickly buried

3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Reason,

--Teeth and bones biologically contain calcium but the teeth is more tougher and durable than the bone, Even when a  body is decomposed, the teeth most times are not  affected at all.

Bones of an adult mammal left on the surface will decompose faster than the one buried because of the biological (natural decomposing ) and physical processes(temperature, wind, sunglight, rainfall ) which will both act on it at the same time because of its exposure.

- soft body parts of any animals will decompose fastest as bacteria will feed on it immediately since it lacks minerals that can elongate preservation.

5 0
3 years ago
What is meant by the term drug delivery?
d1i1m1o1n [39]

Answer:

Drug Delivery

Explanation:

Drug delivery is the method or process of administering a pharmaceutical compound to achieve a therapeutic effect in humans or animals. For the treatment of human diseases, nasal and pulmonary routes of drug delivery are gaining increasing importance

8 0
2 years ago
Flock X Flock Y Flock Z Total Pieces of Food Eaten 57 153 90 Food Percentage* % % % Simulated Number of Birds in Flock for 2nd G
Zepler [3.9K]

Answer: The percentage would be 19%, 51% and 30%.

Explanation:

Since we have given that

Number of food eaten by X = 57

Number of food eaten by Y = 153

Number of food eaten by Z = 90

Total number of food eaten = 57+153+90=300

So, Food percentage of flock X = \dfrac{57}{300}\times 100=19\%

Food percentage of flock Y = \dfrac{153}{300}\times 100=51\%

Food percentage of flock Z = \dfrac{90}{300}\times 100=30\%

Hence, the percentage would be 19%, 51% and 30%.

9 0
2 years ago
Read 2 more answers
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