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Lesechka [4]
3 years ago
15

Amphibians have internal fertilization that requires the presence of water. true or false

Biology
1 answer:
BaLLatris [955]3 years ago
5 0
False. Amphibians like frogs reproduce sexually like mammals. Where's organisms like the hydra reproduce by budding and organisms like the sea anemone, use water to carry their sperm and eggs.
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Cells will usually divide if they receive the proper signal at a checkpoint in which phase of the cell cycle?
Eddi Din [679]

Answer:

M phase

Explanation:

While there are many checkpoints within the cell cycle, the specific checkpoint you are referring to most likely takes place in the M (mitosis) phase.

Before the M phase (which includes the G1, S, and G2 phases), the cell grows, the number of organelles increases, and DNA replicates. After the G2 phase, the M phase begins. At the beginning of this phase, the DNA condenses, lines up in the center of the cell, attaches to spindle fibers, and is pulled to opposite ends of the cell. If this checkpoint receives the proper signal, the actual division of the cell will occur.

5 0
2 years ago
Can you help me please i will give you a branlist and it’s science
creativ13 [48]
The answer is A because c doesn’t make sense if it’s vibrating wouldn’t we feel or see it?
4 0
3 years ago
What are characteristics of allosteric enzymes? They may have binding sites for regulatory molecules that are separate from acti
stepan [7]

Answer:

The characteristics of allosteric enzymes are listed below.

Explanation:

1 They may have binding sites for regulatory molecules that are separate from the active site.

2 They tend to have sigmoidal curve of V0 vs [S].

3 They undergo conformational change as a result of modulator binding

3 0
3 years ago
Why is 4 the correct answer to number eighteen ? Explain why and please answer this !!
swat32

because that is where the sperm divide to multiply

4 0
3 years ago
Help with these two questions, porfavor! :'/
Aliun [14]

The number of chromosomes does not correlate with the apparent complexity of an animal or a plant:

in humans, for example, the diploid number is 2n = 46 (that is, 23 pairs), compared with 2n = 78, or 39 pairs, in the dog and 2n = 36 (18) in the common earthworm.

4 0
3 years ago
Read 2 more answers
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