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Ratling [72]
2 years ago
14

Heyyyyyyyyyyyyyyyyyyyyyy

Biology
2 answers:
tino4ka555 [31]2 years ago
8 0

Answer:

hey

Explanation:

Gennadij [26K]2 years ago
7 0

Answer:

heyyy girly, how are you?

Explanation:

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What evidence exists that humans evolved in africa?
garri49 [273]

Fossil record of the first possible bipeds is the evidence exists that state humans are evolved in Africa. Modern humans arose in Africa at least 250,000 to 300,000 years ago, fossils and DNA are the evidence that  reveals. Scientists have been unable to pinpoint a more specific homeland because the earliest Homo sapiens fossils are found all across Africa.

Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa. Most scientists currently recognize some 15 to 20 different species of early humans found from Africa.

To learn more about Africa , here

brainly.com/question/1959687

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4 0
1 year ago
what is the Science of naming and classifying organisms based on structural comparisons and genetic evidence
lara [203]

Answer: The science of naming and classifying organisms based on structural comparisons and genetic evidence, is known as taxonomy, a branch of biology.

Explanation: Taxonomy is very important. By categorizing organisms, this branch of biology helps scientists to exchange vital biological information, and therefore understand the diversity of species in our planet.

4 0
2 years ago
List and describe the factors which affect the speed of a chemical reaction
skelet666 [1.2K]
Factors that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, the physical state of reactants and their dispersion, the solvent, and the presence of a catalyst.

Source: Google
6 0
3 years ago
Which hormones are involved in building and maintaining healthy bone tissue? select all that apply?
gavmur [86]
Answer;
Insulin and the growth hormone
The hormones that are involved in building and maintaining healthy bone tissues are Insulin and growth hormone


Explanation;
Insulin has some anabolic properties for bone. It is uncertain whether insulin stimulates bone directly or indirectly by increasing muscle work and thus skeletal loading. 
Growth hormone is a peptide hormone secreted from the pituitary gland under the control of hypothalamus. It directly and through IGF-I stimulates osteoblast proliferation and activity, promoting bone formation. Additionally it stimulates osteoclast differentiation and activity,promoting bone resorption. 
8 0
3 years ago
What is the purpose of an antibody? Group of answer choices to stick to an antigen, alerting your body of the presence of a fore
Alexandra [31]

Answer: Antibodies are proteins that are found in the body on the surface of red blood cells and in the blood plasma ,they are very sensitive to foreign bodies and bad viruses and bacteria,when they notice the presence of anything that poses harm or a threat to the body system,they track it down and fight/destroy it.

Antibodies also play crucial role in hemostasis(stoppage of bleeding) in the sense that when the body is wounded or when someone gets a cut antibodies that are found in the plasma and some substances found in the platelets are released to play a role in sending signal to the blood clotting factors in the blood to be released to arrest the bleeding and prevent the person from bleeding out their entire blood.

5 0
3 years ago
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