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ASHA 777 [7]
4 years ago
7

During the cortical reaction, __________. during the cortical reaction, __________. enzymes are released from the head of the sp

erm enzymes are released from vesicles in the oocyte the zona pellucida disappears multiple sperm fertilize the egg
Biology
1 answer:
Alecsey [184]4 years ago
8 0
During the cortical reaction, enzymes are released from vesicles in the oocyte. <span>The cortical reaction is a reaction for preventing polyspermy, the fusion of multiple sperm with one egg. It is a process which occurs during fertilization by the release of cortical granules from the egg. Cortical granules contain components which establish a permanent barrier to sperm entry.</span>
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False: the dead sea is 8.6 times saltier than the ocean
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Why does moss grow better in the shade?
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Prompt 4:
Andre45 [30]

Answer:

Black-footed Ferrets are weasel-like in body shape and form but are heavier than ... They are therefore limited to the same open habitat used by prairie dogs: ... (several thousand acres of closely spaced colonies) can support and sustain a ... to 60 hectares of prairie dog colony is needed to support one Black-footed Ferret, ...

Explanation:

5 0
3 years ago
Can someone help me with a biology related question? I'm offering good points!!!!! Help me out please.
miss Akunina [59]
First, write out all combinations for the parents:
<u>SsBB</u>:
SB
sB
SB
sB

<u>ssBb</u>:
sB
sb
sB
sb

So now that you know what to put on as the x and y for the Punnett Square, set it up:

<u>     |    SB   |    sB    |   SB    |  sB     </u>
<u>sB | SsBB |  ssBB |  SsBB |  ssBB </u>
<u>sb | SsBb |  ssBb  |  SsBb |  ssBb </u>
<u>sB | SsBB |  ssBB |  SsBB |  ssBB </u>
<u>sb | SsBb |  ssBb  |  SsBb |  ssBb </u>

Now, listing each possible genotype and the number of times they show up in the square:
SSBB
0 times
SSBb/SSbB
0 times
SSbb
0 times
SsBB/sSBB
4 times
SsBb/SsbB/sSBb/sSbB/
4 times
Ssbb/sSbb
0 times
ssBB
4 times
ssBb/ssbB
4 times
ssbb
0 times

Since there are only 4 genotypes are possible, set up ratios of those four:

SsBB:
4 times/16 total = .25 = 25%

SsBb:
4 times/16 total = .25 = 25%

ssBB:
4 times/16 total = .25 = 25%

ssBb:
4 times/16 total = .25 = 25%

This means that the<em> genotypes</em> have a 25% : 25% : 25% : 25% likelihood.


Now, let's figure out the phenotypes of the 4 genotypes:
SsBB:
Ss = dominant
BB = dominant

SsBb:
Ss = dominant
BB = dominant

ssBB:
ss = recessive
BB = dominant

ssBb:
ss = recessive
Bb = dominant

So we have 2/4 that are S-dominant B-dominant and 2/4 that are S-recessive B-dominant.
This means that the phenotypes are:
2/4 = 50% Thin stripes with black eyes, and
2/4 = 50% Thin stripes with gray eyes.

I hope this helped you out :)
6 0
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nordsb [41]

Answer:

The unique properties of carbon make it a central part of biological molecules. Carbon binds to oxygen, hydrogen, and nitrogen covalently to form the many molecules important for cellular fuction. Carbon has four electrons in its outermost shell and can form four bonds.

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