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GREYUIT [131]
3 years ago
14

what is believed to be the first type of cells on earth? a. tree cells b. eukaryotic cells c. prokaryotic cells d. plant cells

Biology
1 answer:
Eddi Din [679]3 years ago
4 0
C. Prokaryotic cells are believed to be the first type of cells on Earth. Many scientists believe this is true, however, this claim has not yet been proven. 
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When organisms grow, what happens to their cells?
omeli [17]

Answer:

B.

Explanation:

whenever a organism grows the cells seperate to make up more room for the organism to keep growing until adulthood to elderly-hood

6 0
2 years ago
Human embryos have tails, which become tail bones before birth. Tails also appear in fish, reptiles, amphibians, birds, and mamm
lana [24]

Answer: a close evolutionary connection between humans and many other mammals

Explanation:

8 0
2 years ago
A researcher claims that the Makira Island and the Santa Ana Island flycatchers are diverging into different species. Identify T
natali 33 [55]

Answer:

Prezygotic barriers:

1. Habitat isolation

2. Behavioral isolation

Explanation:

Pre-zygotic barriers are the barriers which do not allow the formation of the zygote in the organisms.

The two mechanisms of the pre-zygotic barriers are the:

1. Habitat isolation: the Flycatchers do not share the same habitat which is also mentioned in the question that they live on different islands.

2. The behavioural isolation: the Flycatchers could have evolved the different mating rituals as a result of which the could not interbreed.

Thus, Habitat isolation and Behavioral isolation are correct.

8 0
3 years ago
Select the correct answer.
Gala2k [10]

Answer:

the answer is b.

Explanation:

The inside of bone is called marrow, which is responsible for creating blood cells, vital to homeostasis. obviously, bone gives us support, and shape.

so, out of the choices, the answer is b.

6 0
3 years ago
Read 2 more answers
A letter about the evidence of evolution
GuDViN [60]

Answer:

I am writing this in response to a letter regarding evolution. Evolution is increasingly solid, not shaky. Darwin’s “theory” or explanation was a way of understanding what he had discovered (which did not include genes, chromosomes, DNA or nucleotide bases). Our explanations now include genetics and the commonality of mutation.  

Proofs are solid, not in question by serious scientists. Direct observation is one, which we see in the fact that this year’s flu evolved a little too far from last year’s, so flu shots are less effective this year than we would like them to be.  

Fossils tell the story well: whales with legs, dinosaurs with feathers and Tiktaalik. The latter was found in the Canadian north and is part fish, part amphibian, before there were ever any amphibians. Imperfection is a good proof: think of your useless appendix, the very bad design of your ankles, knees, and back (talk to a chiropractor about that).  You have big toes because they used to be useful thumbs for your grasping feet.

Many other animals and even plants similarly have flaws that show their evolutionary past. Two large human chromosomes reflect the coming together of two chimpanzee chromosomes each.

Hope it helps,

Please mark me as the brainliest

Thank you

5 0
2 years ago
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