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ololo11 [35]
3 years ago
5

The DNA sequences below show DNA segments for four different species. DNA SEQUENCES Species A TGG CAA CGG CAG ATT TAG Species B

TGG CTA CGG CAG ATT TAG Species C TGC CTA CGG CTG ATT TAG Species D TGG CTA CTG CTG ATT TAG Scientists sometimes use DNA sequences such as these to determine the relatedness of different species. Which of the following is a necessary condition for scientists to use DNA sequences in this way?
Biology
2 answers:
ArbitrLikvidat [17]3 years ago
4 0

Answer: I think it's A: the DNA of all organisms contains the same four bases.

ehidna [41]3 years ago
3 0

Answer:

It’s C

Explanation:

I took the test

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A mutant E. coli strain does not express lacZ, even in the presence of lactose. What is a possible genotype of the cells?
Likurg_2 [28]

Answer:

The answer is "\bold{lacI^{+} lacP^{+} lacO^{+} lacZ^{-} lacY^{-} lacA^{+}} "

Explanation:

In this question, the prescribed mutant E. Coli does not express the lacZ gene, so beta-galactosidase doesn't quite exist. Therefore in a particular strain, there is also the potential of lacZ– and that only the genetic makeup indicates its production of lactose. Therefore the above-mentioned option is correct.

5 0
3 years ago
Over the past 300 years, how did the role of the ocean change with respect to the amount of carbon dioxide in the atmosphere
spin [16.1K]

Answer:

Ocean plays the role of regulator.

Explanation:

The role of the ocean change with respect to the amount of carbon dioxide in the atmosphere because oceans plays a role of regulator and balancer. When there is high amount of carbon dioxide in the atmosphere due to burning of fossil fuels and volcanic eruptions so the ocean absorb that extra amount of carbon dioxide from the atmosphere while on the other hand, when there is decrease in the concentration of carbon dioxide in the atmosphere, the ocean gives its carbondioxide gas to the atmosphere to regulate the concentration.

4 0
3 years ago
Communication between cells tissues and organs blood component
Scorpion4ik [409]

Answer:

Cells,tissues,organs,organs systems and components of blood all are interlinked.Because an organ system cannot function all alone.

Explanation:

Different types of cells perform specific functions in the body. A group of cells binds to form a tissues and it performs the same function as the cells.There are four different types of tissues that make up the human body. they are epithelial,connective,nervous and muscle tissues.

1. Epithelial Tissues: It is made up of cells that forms the inner and outer lining of body surface.It protects internal organs of the body assimilate nutrients and secrete hormones.

2.Connective Tissues: The cells forms skeleton such as bones and cartilages.

3. Muscle Tissues: It is made up of cells ability to movement and contraction.Bones are covered by muscle tissues allows the body to movement.

4.Nervous Tissues:It is made of nerves and neurons carries signals to the brain. It make up the brain and nerves are connected through out the body.

5. Blood components: Plasma,RBCs, WBCs,Platelets

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8.WBCs: Significant in immune system and performs immune response

9.Platelets: It clots blood

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6 0
3 years ago
Which glycolytic enzyme(s catalyzes a reaction with an enediolate intermediate?
adell [148]
The triose phosphate isomerase (TPI) is the glycolitic enzyme that catalyzes a reaction with an enediolate intermediate. It <span>plays an important role in efficient production of energy and is essential in </span>glycolysis. This<span> </span>enzyme catalyzes<span> the reversible interconversion of the </span>triose<span>phosphate </span>isomers dihydroxyacetone phosphate<span> and D-</span>glyceraldehyde 3-phosphate<span>.</span>
4 0
3 years ago
Read 2 more answers
PLSSS HELPP MMEE!!
Nastasia [14]

Explanation:

Plants use carbon dioxide in the atmosphere during photosynthesis, herbivores eat the plants, and a carnivore eats an herbivore.

8 0
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