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Archy [21]
3 years ago
14

__________ is the actual structure that will implant into the endometrial lining.

Biology
1 answer:
LiRa [457]3 years ago
4 0

Answer:

Blastocyst

Explanation:

As morula moves towards the uterine cavity by the end of the fourth day of fertilization, there is an increase in the number of its cells. Morula is transformed into a hollow ball of cells that has an internal cavity called blastocele, outer cells (trophoblast) and the inner cell mass.

This structure is called blastocyst which is present as a free structure in the uterine cavity for 2 days after which it becomes attached to the endometrium of the uterine wall. Attachment of blastocyst to the endometrium of the uterine wall is called implantation. The enzymes secreted by blastocysts make a burrow in the endometrium to facilitate implantation

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Bumek [7]

Answer:

Kidneys

Explanation:

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3 0
2 years ago
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What is the answer to this question?"explain two difficulties an ecologist might have in counting a population of migratory bird
dimulka [17.4K]
<span>It may be difficult for ecologists to determine the size of a bird population if that population migrates to different locations throughout the year. During migration, some birds may split off from the group and not return, others may die, and still others may join. Therefore, the bird population will be in constant flux. It is hard to know, when the birds return to their prior location, if the population consists of the same group of birds (in addition to deaths and births) or whether it has grown or shrank through other means. However, to estimate the size, an ecologist can track a migratory flock through several years, counting each year to get a general sense of the population size. Additionally, given one measurement, an ecologist could consider the average lifespan and birth rates of the population to extrapolate the size of the population in subsequent years.</span>
6 0
3 years ago
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aksik [14]
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Hope it helps!
6 0
3 years ago
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pav-90 [236]

Answer:

a kid crying

Explanation:

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