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Dominik [7]
3 years ago
13

What change is likely to occur in a population of beetles that suddenly faces predation from an invasive species of frogs?

Biology
2 answers:
Ipatiy [6.2K]3 years ago
6 0
The population density of beetles will mostly likely decrease.
marusya05 [52]3 years ago
4 0
The population density of beetles will decrease.<span>
</span>
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Arrange the order of events for the internalization of LDL particles into cells:
ElenaW [278]

Answer:

The correct answer is "5-1-3-2-4".

Explanation:

Internalization of LDL particles into cells, is needed to form the intracellular vesicles known as endosomes. The order of events that allow for this process are:

5) LDL receptors migrate to the cell surface and cluster in clathrin-coated pits. Clathrin acts directing the receptors to the cell membrane region where endosomes are formed.

1) A combination of cholesterol and apolipoprotein binds to LDL receptors and becomes internalized as endocytotic vesicles. Once the receptors are in the proper cell membrane region, cholesterol and apolipoprotein are bound and internalized.

3) Several endocytotic vesicles fuse to form an endosome.

2) The environment of the endosome becomes acidic, which causes the LDL to dissociate from its receptor; additionally, the endosome fuses with a lysosome. LDL should be dissociated from its receptor since it is going to be degraded in the following step.

4) The LDL particle is degraded by the lysosome. This takes place after endocytosis, when LDL particles are transported into lysosomes once they are fused, cleaving the cholesterol esters into cholesterol and fatty acids.

6 0
3 years ago
The suprachiasmatic nucleus influences the release of melatonin by its effect on the ________________.
anyanavicka [17]

Answer:

Pineal gland

Explanation:

The suprachiasmatic nucleus is the paired nucleus made of about 1000 neurons each in the hypothalamus. The suprachiasmatic nucleus is involved in maintaining the endogenous clock or the internal clock.

The suprachiasmatic nucleus controls the circadian rhythm by controlling the amount of melatonin. The melatonin is produced by the pineal gland from the serotonin and tryptophan precursors.  The hypothalamus thus controls the amount of the melatonin by regulating the pineal gland.

Thus, Pineal gland is the correct answer.

5 0
3 years ago
Sigfried is a science student who develops the following hypothesis: If ants select blue sugar over red sugar, then ants prefer
Elden [556K]

Explanation:

The ants choosing the blue sugar over the red sugar isn't a matter of color, but it'd a matter of sugar content.

The ants chose the blue sugar because it has more sugar content than the red sugar.

Hope it helps.

7 0
3 years ago
.
Aleksandr [31]

Answer:

anther

Explanation:

3 0
3 years ago
Read 2 more answers
A hybrid allotetraploid species (2n1 + 2n2 = 60) was backcrossed to one of the suspected parents (2n1 = 30). What is the ploidy
leonid [27]

Answer:

45 chromosomes (2n1 + n2)

Explanation:

The allotetraploid 2n1+2n2=60 has 60 chromosomes total, two sets of them of type 1 and two sets of chromosomes from the other type (2).

If the suspected type 1 parent is diploid with 30 chromosomes, then the allotetraploid has 30 type 1 chromosomes and 30 type 2 chromosomes.

<u>During meiosis, the germ cells reduce the total chromosome number by half.</u>

  • The gametes produced by the allotetraploid will have 15 type 1 chromosomes and 15 type 2 chromosomes.
  • The gametes produced by the suspected parent will have 15 type 1 chromosomes.

When these gametes combine during the backcross, the F1 zygote will have a diploid number of 30 type 1 chromosomes (15 coming from the allotetraploid and 15 coming from the suspected parent) and 15 type 2 chromosomes (which will be haploid because they all came from the allotetraploid).

6 0
3 years ago
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