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natali 33 [55]
3 years ago
9

There are ongoing arguments among taxonomists as to which phyla represent the closest relatives of phylum Annelida. Some propose

that these worms share a common ancestor with the arthropods (crabs, insects etc.). However, the majority continue to keep the annelids lumped together with the Lophotrochozoa. The reasons for this are many but probably the least disputed comes from:______.
a. the segmented body plan of the annelids.
b. molecular analysis.
c. metamerism.
d. schizocoelous origin of the coelom.
Biology
2 answers:
NikAS [45]3 years ago
8 0

Answer:

a. the segmented body plan of the annelids

Explanation:

  • lophotrochozoan is a taxonomy of animals that includes annelids, bryozoans, and brachiopods.
  • This taxonomy of creatures was defined in 1995 as the last ancestor of the taxa of worms, mollusks, and annelids. Their classical definition depends on the topology of the spiral tree of life.
  • Annelids have a segmented body part wherein the external morphological features are repeated in every body segment. It allows the animal to become bigger and makes their movement more fat and efficient.
Mrac [35]3 years ago
3 0

Answer:

B: Molecular Analysis

Explanation:

I clicked on the other mans answer and was quite dissapointed to see that it was incorrect, so im writting this to tell you its B.

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Answer:

The correct answer is:  d. REs activity is best preserved by freezing the RE and thawing it out for brief periods of time as needed.

Explanation:

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  • Freezing of restriction enzymes (REs) directly without the use of glycerol will cause the movement of water molecules within the proteins as well layering of water molecules on the protein surface.
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7 0
3 years ago
A research group has discovered an organism with cells that contain a previously undescribed organelle. They do some tests on th
Vlad [161]

Answer:

The suitable option will be - B

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Explanation:

The results were -

Glucose: None

CO2: Increase

O2: None

ATP: Increase

NADH: Increase

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  • water is also used in this process. NAD+ gets reduced to NADPH. In this system carbon dioxide is produced as a waste byproduct. ATP is produced as the main product. ATP is also used as a source of energy.

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3 years ago
An organism that reproduces using binary fission, a type of asexual reproduction, creates an identical copy of a cell when
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3 years ago
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Dominik [7]

Answer:

The steps involves making hypothesis, deriving predictions from the logical consequences and then carrying out experiments based on those predictions.

Explanation:

Step 1: make a observation .

Step 2: Formulate a statement or question.

Step 3: Form  the hypothesis .

Step 4: make a prediction based on the hypothesis.

Step 5: test the hypothesis whether its true or not.

Step 6: use the results to conclude the experiment.

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1. Define fitness as it used to describe adaptation
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Answer:

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Adaptive traits are very much important in a constantly changing environment as they increase the chances of survival of a population in the environment.

For example, Darwin's finches adapted to develop different types of beaks in order to get nutrition in different environments. Long necks of giraffes are also considered as a result of adaptation which helps them get the food located high on trees.

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