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leonid [27]
4 years ago
8

Why are chromosomes not always visible?

Biology
1 answer:
taurus [48]4 years ago
3 0
Chromosomes sit around uncoiled and loose strands that are called chromatins when it's time for calls to reproduce they shrink and wrap tightly which then form DNA
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Which of the following describes the embryonic period
dangina [55]

There should be options for this question. I manged to find them elsewhere. They are:

A) the period during which tremendous growth occurs and the organs continue to develop and become  functional

B) the period during which the umbilical cord develops

C) the period during which the major organs and structures of the organism first develop

D) the period during which the zygote moves down to the uterus and begins to implant in the lining

The correct answer is C. The embryonic period is the period during which the major organs and structures of the organism first develop. The embryonic period lasts from implantation of the egg in the uterus until about 8 weeks from the time of conception. It is the second major stage of prenatal development, prior to embryonic is the germinal stage and lastly is the fetal stage.

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3 years ago
Central nervous system depressants are also known as.
Gelneren [198K]

Answer: They are also known as  <u>B. tranquilizers</u>

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2 years ago
Which of these macromolecules are modified within the rough endoplasmic reticulum?
aalyn [17]

Answer:

The answer is A. Proteins

6 0
3 years ago
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Which substance is a compound <br><br> O salt<br> O phosphorus<br> O sulfur<br> O oxygen
stepladder [879]

Answer:

A. Salt

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2 years ago
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Drag the tiles to the correct boxes to complete the pairs.
AfilCa [17]

Genes close to each other- Strongly Linked genes

Genes on different chromosome- unlinked genes

Genes apart from each other,but on same chromosome-  linked genes

Explanation:

Linkage is defined as the tendency of genes located on same chromosome to be inherited together.

Genes located on different non-homologous chromosome are called unlinked genes.

Genes located on same chromosome are called  linked genes.

Genes  located close to each other are strongly linked as tend to show complete linkage.

Genes located on different chromosome tend to show incomplete linkage.

5 0
4 years ago
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