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3 years ago

5. Are pests in our subdivisions (raccoons squirrels armadillos, moles) the decline of coral reefs in our oceans,

1 answer:

3 0

Obviously not. Pests in our subdivisions don't have any negative affect on nature. HUMANS are the main reason for the destruction of our nature. We pollute oceans and destroy forests and homes for creatures. The "pests" that you refer to actually vanishing themselves due to our destruction causing their predators to disappear.

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Increased atmospheric carbon dioxide negatively affects coral reefs by: select one:

Ksenya-84 [330]

Increased atmospheric carbon dioxide will diffuse to the ocean water (since normally, there is lower concentration of dissolved carbon dioxide in the ocean water). The dissolved carbon dioxide takes into the form of carbonic acid thereby increasing acidity of ocean water. More often than not, the acidification of ocean water leads to detrimental results especially in marine organisms that are pH sensitive such as coral reefs and many invertebrates.

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4 years ago

Which of the following types of organism represents the first life form on earth?

mojhsa [17]

Anaerobic, heterotrophic procaryotes

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3 years ago

As sea levels rise, which of the following will affect marine biodiversity?

KiRa [710]

Answer:

Underwater plants will receive less light.

Explanation:

When sea level rises the amount of solar energy in the aquatic environment is decreased and this makes underwater plants receive less light and their development is impaired. This is because, with less sunlight, aquatic plants are unable to photosynthesize and absorb the carbon needed for their metabolism, thus end up dying and diminishing the plant diversity of the sub-aquatic environment.

In addition, many underwater organisms (such as some fish) feed exclusively on these plants. If these plants fail to grow, these fish will be without food and will eventually die; This will also cause problems for the diversity of the underwater environment.

3 0

4 years ago

Comparing amino acid sequences in proteins has been used to determine the relatedness of organisms. Below is a graphic that show

Tju [1.3M]

Answer:

A) Species A and E are more closely related than either species are related to species D.

B) Between A and B = 99.1%

Between species A and C =97.5%

Between species B and C = 97.3%

Similarity in amino acids sequence reflects similarity in DNA sequence

C) Species A and E are most closely related

D) Species A and E have the most similarity in amino acid sequence, and hence DNA sequence.

Explanation:

A) The amino acid sequences of the protein, keratin, in species A and D has a difference of about 19 whereas species A and E have a difference of only 1. Therefore, it means that keratin in species A and D will have differences in structure whereas between species A and E, they would have almost the same structure.

Also, species D and E have a difference of 20 in their amino acids sequence, therefore, the structure of keratin in both species will have differences in structure.

B) Similarity between A and B:

450 - 4 = 446

In percentage: 446/450 × 100% = 99.1%

Similarity between A and C:

450 - 11 = 439

In percentage: 439/450 × 100% = 97.5%

Similarity between B and C:

450 -12 = 438

In percentage: 438/450 × 100% = 97.3%

The sequence of DNA of species determines their amino acid sequences because information in DNA is transcribed to RNA which are then used to make proteins. Therefore, if a species are very closely related, they are expected to have very similar genetic sequences and thus proteins too. This is reflected in similarity between amino acid sequences in their proteins.

C). Species A and E are most closely related.

D) Species A and E have only a single difference in their amino acids sequence for Keratin. This translates to about 99.7% similarity which is the highest among all the species compared. Therefore, species A and E are most closely related.

7 0

3 years ago

The energy a cell needs to build molecules or to power cellular respiration is supplied by

Anna [14]

Answer:

The energy a cell needs to build molecules or to power cellular respiration is supplied by mitochondria.

Explanation:

Mitochondria are tiny cell organelle present in eukaryotic cells. It is called the powerhouse of the cell. It is referred to as such because it produces most number of energy molecules or ATP that is released from food. It produces 36 molecules of ATP and the cell produces 2 molecules of ATP. This process of releasing energy from food by the mitochondria is called cellular respiration. These energy molecules are then used in various other cellular activities.

7 0

3 years ago