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Neko [114]
3 years ago
9

Water makes up about ____ percent of our body weight.

Biology
1 answer:
zloy xaker [14]3 years ago
3 0
Water makes up 90% of the body.
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Which of the following does natural selection act directly upon? Alleles, genes, individual organisms, or mutations?
Inga [223]

Natural selection act directly upon <u>Alleles</u>

Explanation:

Genes, such as that of fur color, have many variants called alleles. Natural selection act on the alleles and chooses the best fit for an environment and eliminates the disadvantageous ones from the population over generations. Mutations are a rare occurrence that increases the number of allelic variants of a genes on which natural selection can act upon.

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The relationship between the remora is and the shark is an example of
malfutka [58]

Answer:

An example of mutualism is the relationship between remora and shark.

Explanation:

Remora depends on sharks for food and locomotion. It has a sucking mouth that helps it to attach itself to the shark.

4 0
2 years ago
Why does DNA look like a folded thread? HELP ME PLEASE!!!!
ololo11 [35]

Answer:

During DNA packaging, long pieces of double-stranded DNA are tightly looped, coiled, and folded so that they fit easily within the cell. Eukaryotes accomplish this feat by wrapping their DNA around special proteins called histones, thereby compacting it enough to fit inside the nucleus

8 0
2 years ago
Why are frogs said to have “two lives” ?
Vladimir79 [104]

Answer:

  • One because they are amphibians
  • two because amphibian means two lives
  • third because they live on land and sea
  • Fourth because they live longer (I think)

Explanation:

Frogs begin their lives in the water as eggs and then tadpoles and when they are fully developed they live on land.

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6 0
3 years ago
Read 2 more answers
Green algae are more closely related to plants than they are to kelp.Why is this so?
In-s [12.5K]

Answer: Green Algae are closely related to plants.

Explanation: Green Algae are closely related to plants because of they possess photosynthetic pigments as plants.

Green algae and plants are closely related in that they can manufacture their own food from nutrients and sunlight through the process of photosynthesis

Green algae also possess the same carotenoids and chlorophyll a and b as land plants which make them closely related.

Kelps don't have these characteristics.

6 0
3 years ago
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