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ahrayia [7]
2 years ago
7

The biosphere is the only one of Earth’s systems that contains life.

Biology
2 answers:
Rudik [331]2 years ago
4 0

Answer:

true

Explanation:

edg. 2020

Ivahew [28]2 years ago
3 0

Answer:

its true

Explanation:

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What category do you think humans fall into? Explain your reasoning.<br> reproduction wise.
Bingel [31]

Answer:

Mammals

Explanation:

Humans are classified as mammals because humans have the same distinctive features (listed above) found in all members of this large group. Humans are also classified within: the subgroup of mammals called primates; and the subgroup of primates called apes and in particular the 'Great Apes'

5 0
3 years ago
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Which of these scientists is best known for his idea that characteristics an individual gains in its lifetime could be passed on
Anna [14]
This was Lamarck's idea. Here's an example: Suppose giraffes originally had short necks that they stretched to reach high-up leaves in the trees. This continuous stretching of the neck was passed onto offspring, who as a result had slightly longer necks. This continued for multiple generations until we get today's long-necked giraffe. Lamarck was on to something (that something being evolution by natural selection, which Darwin discovered), but his theory wasn't completely correct since organisms can only pass on genes (segments of DNA that code for a characteristic or function) to their offspring. Since "stretching" would not code into DNA, it wouldn't be passed onto offspring, proving Lamarck's theory incorrect.
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3 years ago
What is the purpose of colorful petals?
blondinia [14]

Answer:

The purpose of colorful petals is to attract insects

7 0
2 years ago
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Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. the p
Olenka [21]

Answer is hypertonic.

The ability of an extracellular solution to make water move into or out of a cell by osmosis is known as its tonicity. Tonicity is concern for all living things, especially in in organisms lacking cell wall, <em>Paramecium</em> is one such protozoan. It has specialized structures called contractile vacuoles. A contractile vacuole collects excess water from the cell and release it out, keeping the cell from lysing as it takes on water from extracellular environment which hypotonic (a lower osmolarity than the cell’s cytoplasm) as compared to hypertonic environment inside <em>Paramecium</em>.

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3 years ago
Chemical or pysical is shiny and silvery
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