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inn [45]
4 years ago
12

The structure that contains two arteries and one vein, and connects the developing embryo to the mother's body, is called the __

___. amnion placenta embryo umbilical cord
Biology
1 answer:
OverLord2011 [107]4 years ago
4 0
Umbilical cord is the correct answer to the fill in the blank.
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Which statement directly describes the cells produced by meiosis
kogti [31]

Answer:

The statement '<em>the genetic material of the original cell is divided among the new cells</em>' describes how cells are produced in meiosis process.

<u>Explanation: </u>

<em>In meiosis a single cell is divided into twice to form four cells and it contains the original half amount of 'genetic information'.</em> In meiosis, the two cells are called daughter cells are produced, and each identical cells to the parent cell meiosis are produced four haploid cells and mitosis are produced two diploid cells.

<em>The meiosis cell division is to reduces the number of 'chromosomes' in the parent cell by its half portion and also they produce four gamete cells.</em> In this process they required to produce 'eggs and sperm' cells for the sexual reproduction .It is the main aim to make a daughter cells with same half so many 'chromosomes' as the starting cell.

4 0
3 years ago
An example of an epigenetic change is
Oksana_A [137]

Answer:

The correct answer is option d.

Explanation:

An illustration of epigenetic change is a microbe, which can stimulate modifications in the host DNA, causing suppression of defenses or weakening of individual cells. Epigenetic changes modify the physical composition of DNA.  

One of the examples of epigenetic change is DNA methylation. DNA methylation refers to the supplementation of methyl group, which inhibits some of the genes from getting expressed. One of the conditions of DNA methylation is cancer.  

In the majority of cancer, the tumor cells go through global hypomethylation. The tumor suppressed genes seem to turn highly methylated in the conditions of cancer.  

5 0
3 years ago
What are the three chemical molecules that make up the subunits of DNA?​
kotykmax [81]

Answer:

Nucleotides are the subunits of DNA. The four nucleotides are adenine, cytosine, guanine and thymine. Each of the four bases has three components, a phosphate group, a deoxyribose sugar and a nitrogen-containing base.

5 0
3 years ago
Is there a mammal that lays eggs
Bess [88]
<span>Yes, there are mammals that lay eggs instead of giving birth to a live young. These mammals are called Monotremes. One best example to this is the platypus and echidnas. Platypus, which is also known as the duck-billed platypus, is a semiaquatic egg laying mammal. Echidnas on the other hand are also called as spiny eaters. Echidna and platypus are only the surviving members of the Tachyglosside. And are the sole extant egg laying mammal</span>


8 0
3 years ago
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What is another term for the hot springs found on the ocean floor?
Dmitry_Shevchenko [17]
I think it's hydrothermal vents? hope its right because I have short term memory loss.
6 0
3 years ago
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