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dolphi86 [110]
2 years ago
11

Explain why some parts of a plant can act as both a source and a sink.

Biology
1 answer:
Varvara68 [4.7K]2 years ago
5 0

Answer:

Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing. Rhizomes are sinks when growing but become sources in the spring when they provide energy for new growth.

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Explain the phases of the moon. what are the periods of rotation and revolution?
cluponka [151]

The Moon is the natural satellite of Earth. Its revolution lasts 27.322 days, while its rotation around its axis lasts 27 days. From the Earth's perspective, the Moon seems to have different phases, where it appears as fully lighted, partially lighted, or totally dark. What the Moon appears to be from the Earth depends on how the Earth, Moon, and Sun are aligned in relation to each other. If the Earth is between the Sun and the Moon, the Moon is full, with the reason being that the Sun is lighting up the side that is facing the Earth. If the Moon is between the Earth and Sun, then the Moon can not be seen, it is totally dark, and that is because the side that is facing the Earth is not lighted by the Sun at all. If the Moon is positioned sideways, not being in a straight line with the Earth and Sun, then it appears to be partially lighted, and that is the side that can be seen from Earth that is lighted by the Sun.

5 0
3 years ago
Which body part is vestigial in humans?
Stels [109]

Answer:

The answer is the 2nd picture: the coccyx bone in humans.

Explanation:

Vestigial Structure:

Structures or anatomical features that do not currently serve a function is the bodily processes of a living organism. Vestiges are believed to have performed active functions in the organism's ancestors throughout its evolutionary history.

Coccyx Bone:

The coccyx or tailbone is an evolutionary remnant of our tree dwelling ancestors. Coccyx has no use in modern humans as we do not need to climb trees.

The coccyx in modern humans serves as an anchor for muscles.

5 0
3 years ago
Which kingdom of organisms is photosynthetic, multicellular, eukaryotic and non- motile?
Blizzard [7]

Answer:

kingdom plantae

Explanation:

They are photosynthetic multicellular organisms that are eukaryotic.

5 0
2 years ago
A DNA strand with the sequence A-T-T-G-C-T would be complementary to which of the following
Keith_Richards [23]

T-A-A-C-G-A

i just finished the quick check this is the right answer

hope this helps :)sorry if it doesn't

3 0
3 years ago
Difference of positive and negative feedback
goldfiish [28.3K]

Answer:

The difference is:

a) Positive feedback increases a change while negative feedback reduces a change.

b) Positive feedback occurs specific situations while negative feedback occurs in the body.

c) Positive feedback break down the homeostasis while negative feedback maintain the conditions of homeostasis.

d) Positive feedback has less frequent mechanism while negative feedback has more frequent mechanism.

e) Positive feedback enhances change while negative feedback resists change.

f) Positive feedback has a wider range while negative feedback has a narrow range.  

Explanation:

Hope they help.

5 0
3 years ago
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