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pav-90 [236]
2 years ago
10

What is the best explanation for extinction of various species?

Biology
1 answer:
alukav5142 [94]2 years ago
5 0

Answer:

I believe it would be Dramatic climate change

Explanation:

With our earth constantly changing, the species living in the climate that is being erased are dying out because of the loss of their habitat

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The fur color in a colony of mice has been brown for many generations. One gene appears to code for the fur color pigment. In a
creativ13 [48]

Answer:

A mutation in the DNA sequence of the gene for brown fur  

Explanation:

The mutations are capable of changing the encoded protein product, in this case the gene that encodes for the fur color pigment. This mutation may have occurred during mitosis or meiosis divisions.

If it is a spontaneous mutation that occurred in the germinal line (meiosis) and confers an adaptive advantage, it will increase their frequency in the population.

5 0
3 years ago
Bill has a perfect cube of an unknown substance. The density of the substance is 3.0 g/cm. He
Gwar [14]

The volume of the cube of unknown substance is 27\ cm^3. The length of one side of the cube is 9 cm

<u>Explanation:</u>

As per the formula of mass and density, Mass / Density equals to volume. Therefore as the mass of the cube was given to be 81 g and the density of the cube is known to be 3.0 g/\mathrm{cm}^{3},, to help Bill find out the volume. It is the ratio of mass and density and can be calculated as

      \text {volume}=\frac{\text {mass}}{\text {density}}=\frac{81 g}{3 g / \mathrm{cm}^{3}}=27 \mathrm{cm}^{3}

As it is a cube, the volume is product of length, breadth, and height. Here, all sides are same as it is the cube.

        volume= length \times breadth \times height

       27=3 l

      length of cube's one side, l=\frac{27}{3}=9 \mathrm{cm}

7 0
3 years ago
True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone prote
Dmitrij [34]

Answer:

False

Explanation:

The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.

Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases).  This is the way of gene expression regulation.

The effects of modifications are different, for example methylation promotes  condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).

Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.

5 0
2 years ago
What type of signal is long-lasting and works at night? A) olfactory
Elena-2011 [213]

Option A is correct. Your olfactory nerve is the first cranial nerve (CN I). It's also section of your autonomic apprehensive system, which regulates physique functions. This nerve enables your feel of smell.

<h3>What are olfactory signals?</h3>

Listen to pronunciation.  A sequence of occasions in which cells in the nose bind to scent-bearing molecules and send electrical indicators to the talent where they are perceived as smells.

<h3>What is an example of olfactory?</h3>

The excellent smell of spring flowers, for example, may be considered an "olfactory delight." A associated word, olfaction, is a noun referring to the experience of scent or the act or procedure of smelling.

Learn more about olfactory here:

<h3>brainly.com/question/13153033</h3><h3 /><h3>#SPJ4</h3>
3 0
1 year ago
All animals are _______. a. producers b. omnivores c. herbivores d. consumers
vladimir1956 [14]

The right option is; d. consumers

All animals are consumers

Consumers are organisms that usually feed on other organisms or organic matter in order to gain energy because of their inability to manufacture their food from inorganic sources. All animals are consumers and they are also known as heterotrophs. There are different types of consumers. They include; primary consumers (herbivores e.g. goats, cows), secondary consumers (carnivores e.g. wolves, crocodile), and tertiary consumers (large carnivores e.g. eagle, lion)


3 0
3 years ago
Read 2 more answers
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