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ycow [4]
3 years ago
14

In meiosis for females the egg cell is much larger than the three polar bodies,why does it need that extra cytoplasm

Biology
1 answer:
ELEN [110]3 years ago
6 0
The large cell develop into mature gamete call ovum and it cytoplasm from the egg. The unequal distribution of the cytoplasm during oogenesis is necessary as the zygote that results in the cytoplasm from the egg. So the egg needs to have as much cytoplasm as possible
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Where should the origin of the swim bladder be placed on the phylogenetic tree?
dolphi86 [110]

Answer:

At the base of Actinopterygii

*This is a unique characteristic of this group.

Explanation:

A peculiar characteristic organ observed in ray-finned fish (as well as in Sarcopterygii, or lobe-finned fish) but not in cartilaginous fish like shark is the swim bladder.

This organ is often described to be a sac containing gas. It helps these set of fish adjust its buoyancy and its position in the water by regulating the concentration of gas present in it.

The swim bladder is formed as a pouch coming off the embryonic digestive tract, and in chondrosteans and holosteans, with a set of teleosts e.g. the eels, it maintains an open pathway to the esophagus. In majority of the bony fish, the swim bladder is totally sealed off, as gas levels in their swim bladder are regulated by producing gas into the bladder via a network of capillaries, the rete mirabile (Latin word for "marvelous net").

The swim bladder is homologous to the lungs of tetrapods. Since they are formed in the same vein. Few fishes that have an open swim bladder employs it as a breathing organ.

6 0
2 years ago
3. What are some examples of fluctuations in abiotic cycles?​
ipn [44]

Answer:

1.The carbon cycle.

2.The nitrogen cycle.

3.The water cycle.

4.The sulfur cycle.

5.The phosphorus cycle.

6.The rock cycle.

Explanation:

<em>Hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>you</em><em> </em>

<em>Crown</em><em> </em><em>me</em><em> </em><em>as</em><em> </em><em>brainliest</em><em>:</em><em>)</em>

4 0
2 years ago
Proteins that speed up the rate of chemical reactions in the cell without requiring high temperatures are antibodies.
Ymorist [56]
This is false. The Enzymes are proteins that speed up the rate of chemical reactions in the cell without requiring high temperature. Antibodies are proteins which react to alien or unknown organisms that enter our body like bacteria and viruses.

I hope it helps, Regards.     <span> </span>
6 0
3 years ago
Read 2 more answers
Use the drop-down menus to choose the correct answer to complete each statement
USPshnik [31]
Answer:
Moon, planet, planet
Explanation:
Moons revolve around planets, Jupiter is considered a planet because it revolves around the sun, and a planet is a body that revolves a star.
6 0
3 years ago
Which evidence best supports is the theory that organisms, such as whales , have common ancestry and have evolved ? Select all t
Tanya [424]

Answer:

Another evidence of evolution is the convergence of form in organisms that share similar environments. 

7 0
3 years ago
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