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BartSMP [9]
2 years ago
7

What is the difference between marsupial and placental mammals.

Biology
1 answer:
faltersainse [42]2 years ago
8 0

Answer:

Marsupial animals(including kangaroos) raise its offspring inside a pouch. Placental animals complete development nourished by the <em>placenta.</em>

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I disagree with this statement. Asexual organisms are at a lower risk for extinction due to the fact that they do not need a partner to procreate. They have an easier time making offspring.
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3 years ago
What evidence is there that the 15 species of finch all evolved from one common ancestor?
antoniya [11.8K]
Darwin’s Finches: Darwin observed that beak shape varies among finch species. He postulated that the beak of an ancestral species had adapted over time to equip the finches to acquire different food sources. This illustration shows the beak shapes for four species of ground finch: 1. Geospiza magnirostris (the large ground finch), 2. G. fortis (the medium ground finch), 3. G. parvula (the small tree finch), and 4. Certhidea olivacea (the green-warbler finch) the Grants measured beak sizes in the much-reduced population, they found that the average bill size was larger. This was clear evidence for natural selection of bill size caused by the availability of seeds. The Grants had studied the inheritance of bill sizes and knew that the surviving large-billed birds would tend to produce offspring with larger bills, so the selection would lead to evolution of bill size. Subsequent studies by the Grants have demonstrated selection on and evolution of bill size in this species in response to other changing conditions on the island. The evolution has occurred both to larger bills, as in this case, and to smaller bills when large seeds became rare.

6 0
3 years ago
Predators are found in grasslands because.... *
IgorLugansk [536]

herbivores ate numerous

7 0
3 years ago
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Suppose it were possible to conduct sophisticated microscopic and chemical analyses of microfossils found in 3.5-billion-year-ol
soldier1979 [14.2K]

Answer:

The correct answer is option 3. a nucleus.

Explanation:

The first genetic material present in the early organisms were RNA which was present in the microscopic organisms back then 3.5 billion years ago which means it is normal to have RNA in such microfossils chemical analysis.

Since, the nucleus was not present in early life forms of prokaryotes like bacteria. so, it is unusual to find nucleus in the fossils of stromatolite rocks.

Thus, option III is the correct answer.

7 0
3 years ago
1) The layer of Earth below the crust and above the outer core is
Tresset [83]

Answer:

A) the mantle

Explanation:

The mantle is between the crust and the outer core.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

8 0
2 years ago
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