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lisabon 2012 [21]
4 years ago
9

Which two organisms are most closely related?

Biology
2 answers:
nika2105 [10]4 years ago
6 0

Answer:

(B). Brown algae and dinoflagellates.

Explanation:

In a phylogenetic tree, two species are considered as most closely related if they share a more common ancestor than the others. The nodes of tree represent the common ancestor, while the tips of branches represent species originated from that ancestor.

As in given tree, dinoflagellates and brown algae share a common ancestor as they evolved from the same ancestor, they are most closely related to each other.

Thus, the correct answer is option (B).

Anarel [89]4 years ago
4 0
The answer is B. Hope this helps!
Reasoning: Brown Algae and Dinoflagellates are both on the same branch, unlike other answers.
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4 years ago
X has successfully been transmitted to your body; you are now infected. All of the following among A-D are possible consequences
Natasha2012 [34]

The complete options to the question includes:

A.You never show any symptoms of disease and there is no sign of the pathogen in your body.

B.You exhibit mild symptoms of disease and the levels of the pathogen in your body are quickly reduced and eliminated.

C.You succumb to the worst effects of the disease but survive due to administration of antimicrobial agents.

D.You never show any symptoms of disease, but the pathogen persists in your body.

E.There are no exceptions, A-D are all plausible outcomes.

Answer: The correct option is A (You never show any symptoms of disease and there is no sign of the pathogen in your body).

Explanation:

Infectious diseases occurs when an individuals system is invaded by pathogenic microorganisms (virus,bacteria,fungi and parasite). These microorganisms may or may not cause disease but this depends on the healthy state of the host. They can also be transmitted from one person to another.

To explain the options why all are plausible outcomes when X has successfully been transmitted into the body except A includes:

B) option B can occur when the immune system of the host is able to combat X.

C.) Option C can occur when antimicrobial is given to suppress the activities of X

D) option D can occur when the individual may become an asymptomatic carrier of X. ( Individual shows no symptoms and signs of disease caused by X but the pathogen is still present in the body).

But option A is not possible as X must be present to show there was a transmission.

6 0
3 years ago
It is a small RNA molecules that interfere with gene expression.
Semmy [17]

Answer:

miRNA ( micro RNA )

Explanation:

The small RNA molecule that interfere with gene expression are miRNA. The miRNA is micro RNA that are non-coding molecules of RNA. These small RNA regulate gene expression after transcription (post transcription).

The miRNA binds to 3' UTR region (untranslated region ) and halt the process of protein production and thereby silencing mRNA.

5 0
3 years ago
What is Evolution in Biology?
katrin2010 [14]

Answer:

In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. ... Evolution relies on there being genetic variation in a population which affects the physical characteristics (phenotype) of an organism.

Explanation:

Hope this helps!

3 0
3 years ago
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