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3 years ago

Which sphere does a dolphin swim in?

Biology

2 answers:

7nadin3 [17]3 years ago

6 0

A hydrosphere is where a dolphin swims and lives in. It is defined as a mass of water, and includes the ocean.

pashok25 [27]3 years ago

3 0

The sphere does a dolphin swim in is the hydrosphere. The answer is letter D. The first layer, troposphere, is where we are able to do most of our activities. This is where we can see the formation of clouds, the production of rain, hail, snow and other weather phenomenon. Also, this layer is where the greatest amount of air pressure because most of the molecules of air are in this area. Like us, air has also mass and the pressure is brought down by the earth’s gravity causing an increase in weight exerted on you as you descend lower into the atmosphere. So, as you enter into the other layers of atmosphere above the troposphere, the air pressure starts to decrease. Below the atmosphere is the hydrosphere. This is where all liquid forms are located. And since the seawater has a greater mass than air, it has the greatest pressure.

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Which level of biological classification do Mammalia and Hominidae represent, respectively?

cupoosta [38]

The answer is class and family.

Taxonomic groups are used for biological classification. There are eight main taxonomic groups: domain, kingdom, phylum, class, order, family, genus and species, with the domain as the most inclusive and species as the least inclusive. If we take a look on Mammalia and Hominidae classification, we can assume that Mammalia represents class, and Hominidae represents family:

1. Domain: Eukarya

2. Kingdom: Animalia

3. Phylum: Chordata

4. Class: Mammalia

5. Order: Primates

6. Family: Hominidae

7. Genus: Homo

8. Species: Homo sapiens

3 0

3 years ago

Cichlids fish evolution, as seen in lake victoria in africa, is an example of ______ equilibrium.

wel

Answer:

Evolution

Explanation:

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3 years ago

Hershey and Chase used a DNA-based virus for their work. How might the results have been different if they had used an RNA virus

4vir4ik [10]

Answer:

The correct answer is c.With an RNA virus, radioactive RNA would have been in the final pellet.

Explanation:

Hershey and Chase infected E.coil with bacteriophage which was having DNA as its genetic material. The bacteriophage was labeled with radioactive sulfur and radioactive phosphorus and it was radioactive phosphorus that was found in the bacterial cells or pellet.

As because DNA contains phosphorus, not protein therefore they it was proved that DNA is the genetic material. Similarly, RNA is also a nucleic acid which is genetic material for many viruses and contains phosphorus.

So if Hershey and chase might have chosen an RNA virus then radioactive RNA would have been present in the pellet. So the correct answer is c.

7 0

3 years ago

A) In how many cases in the genetic code would you fail to know the amino acid specified by a codon if you knew only the first t

Vesna [10]

Answer:

a) 28 cases

b) 3 cases

Explanation:

a) From the table of genetic codes, there are 28 codons that specify more than one amino acid assuming only the first two nucleotides are considered. In these cases, one cannot outrightly specify the amino acid the genetic codes are coding for without knowing the last nucleotide of the codes. For example, UU can be for Phenylalanine or Leucine, CA can be for Histidine or Glutamine, etc.

b) From the table of genetic codes, the first two nucleotides of Arginine can be either of CG or AG, that of Serine can be either of UC or AG while that Leucine can be either of CU or UU. Only in these 3 cases would one fail to know which are the first two nucleotides assuming the name of the amino acids are given.

See the attached image for the genetic code.

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3 years ago

The cell membrane is made up of _____.

iogann1982 [59]

A double layer of phospholipids

3 0

3 years ago

Read 2 more answers