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HACTEHA [7]
2 years ago
12

In an experiment, it was found that newborn rats who were genetically predisposed to be skittish, nervous, and high-strung would

develop into calm, exploratory, and stress-resistant adult rats when raised by genetically unrelated, attentive mothers. Although the rats' DNA did not change, the chemicals that controlled their gene expression did change, a phenomenon called: a) epigenetic change. b) allele variation. c) recessive gene mutation. d) dominant gene mutation.
Biology
1 answer:
Pepsi [2]2 years ago
8 0

Answer:

a) epigenetic change.

Explanation:

Epigenetic is referred to changes BESIDES the changes in the genetic changes. It means, not related to mutations but to chemical changes such as methylation, acetylation, ubiquitylation, phosphorylation, that can interfere with the genetic expression. Chromatin modification is another way of epigenetic change.

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has permitted rapid advances in our understanding of structural macromolecules from living cells. ________ has permitted rapid a
NemiM [27]

Answer:

Biogenesis

Explanation:

Biogenesis has permitted rapid advances in our understanding of structural macromolecules from living cells. Biogenesis theory was first coined by Rudolph Virchow and countered the claim of organisms being in existence according to the Big Bang Theory technique. Biogenesis involves the study of how organisms evolved from smaller ones to become complex.

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5 0
3 years ago
Many proteins are made and excreted from the cell. Using the list, put the cellular events in order. a. Vesicles containing prot
Irina-Kira [14]

Answer:

c. Proteins and lipids are made on the ER membrane and put in vesicles.

a. Vesicles containing proteins and lipids fuse with the Golgi bodies.

d. The Golgi bodies tag the molecules to signal their ultimate delivery.

b. Vesicles pinched off from the cristernae carry the molecule to its location.

Explanation:

Proteins are made by the ribosome machinery of the rough endoplasmic reticulum. The proteins made need to be packaged before they are sent outside the cell to their location. If the proteins are not packaged and tagged, then they will be degraded by different enzymes present in the cell. So, the packaging of the proteins is done by the Golgi-complex. After packaging is done and tags are added to the proteins, the proteins move to the outside of the cell in vesicles.

4 0
3 years ago
Why is DNA referred to as the genetic code?<br>​
Gnesinka [82]

The genetic code is the set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins (amino acid sequences) by living cells. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.

4 0
3 years ago
An organism that obtains energy by feeding on other organisms<br>​
leonid [27]

Answer:

Heterotrophs/ or consumers

Explanation:

Heterotrophs, or consumers, are organisms that must obtain energy by consuming other organisms (autotrophs or other heterotrophs) as food.

6 0
3 years ago
What do you think about Global Warming and
Sever21 [200]

Answer:

Because of using fossil fuels nowadays it is used to air pollute the earth causing global warming.

Explanation:

4 0
3 years ago
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