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Marat540 [252]
3 years ago
10

______ act as a barrier to invading cells and viruses. muscle cells connective tissue epithelial cells none of the above

Biology
1 answer:
xz_007 [3.2K]3 years ago
3 0

Answer:

Epithelial cells

Explanation:

Epithelial cells act as a barrier to invading cells and viruses.

It lines the tissues of blood vessels in order to keep blood flowing and keeping you healthy.

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DNA contains instructions for making the different molecules, such as proteins, that a cell needs to grow and function. To use t
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Answer:

C. transcribed, mRNA

Explanation:

DNA, also known as deoxyribonucleic acid, is a molecule that holds genetic information needed to make other molecules in living organisms. However, before this genetic information can be harnessed, it needs to be expressed via two processes called transcription and translation.

Transcription is the first of the two processes that take place during genetic expression. It involves the synthesis of mRNA molecule from a DNA template. In other words, the DNA must first be TRANSCRIBED into mRNA.

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What is population density? answers are A. the number of organisms of a species
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Population density is the total number of organisms within a fixed area.

Explanation:

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The physical properties of a material depend on its
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A chemical properties
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This is the elliptical orbit of the Earth around the Sun. It takes 365.26 days to complete one orbit.
Strike441 [17]

Answer:

Complete orbit around the Sun takes about 365.26 days. The Earth’s rotation axis is tilted relative to the imaginary space orbit around the Sun.  This imaginary plane is called the ecliptic plane.  Position of northern and southern hemisphere toward the Sun varies depending on the season

Explanation:

6 0
2 years ago
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Suppose an alkane had 8 carbon atoms. How many hydrogen atoms would it have? a. 18 atoms c. 10 atoms b. 16 atoms d. 12 atoms
Delvig [45]
<h3><u>Answer;</u></h3>

A. <em>18 hydrogen atoms </em>

<h3><u>Explanation;</u></h3>
  • <em><u>Alkanes are group of hydrocarbon that are saturated</u></em>. They are saturated in the sense that each carbon atom has maximum number of hydrogen atoms.
  • <em><u>The homologous series of alkanes has a general formula of CₓH₂ₓ₊₂.</u></em>
  • Therefore,<u><em> an alkane with 8 carbons will have; (2×8) +2 = 18 hydrogen atoms. </em></u>Thus, the formula of the hyrocarbon will be; C₈H₁₈.
7 0
3 years ago
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