Which of the following are the two characteristics of communities that are related to stability? (Choose all that apply)

Before the age of 4 months, an infant is likely to spit out semisolid foods because of:

Inessa [10]

The correct answer would be: The up-and-down motion of the tongue when sucking.

I hope that helped! c:

3 0

3 years ago

Which of the following statements about change in ecosystems is true?

neonofarm [45]

Ecosystems experience change through human activity and natural events. This is because human activity can impact changes in nature, like climate for example. As a result, ecosystems change in response to the change in nature or natural events, which was caused by human activities. They are interrelated so to speak.

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3 years ago

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Down syndrome, the most common genetic condition in the United States, is also called trisomy 21. What does this mean?

77julia77 [94]

Trisomy=3 chromosomes; 1 more than the required pair (2)

21=the type of chromosome

So, here we can eliminate A and B.

Now we have C and D.

I know that when sperm cell(s) simultaneously fertilize [an] egg, a class of identical twins will form. Therefore, we can eliminate D, leaving us with merely C. Henceforth, C is your final answer.

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3 years ago

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You learn that a Mars lander has retrieved a bacterial sample from the polar ice caps. You obtain a sample of these bacteria and

Misha Larkins [42]

Answer:

a. conservative replication

b. semi conservative replication

c. dispersive replication

d. discontinuous replication

e. continuous replication

The CORRECT ANSWER IS C.

c. dispersive replication

Explanation:

The attached image shows a single band that becomes lighter (in volume) and increase in darker intensity (in times of color) is revealed with consecutive replications. The major pattern that would produce these outcome is dispersive replication.

Conservative replication do reveal two bands (a 14N for the wholly latest molecule, and a 15N for the totally antiquated molecule) after the initial replication. Therefore, this wholly wrong.

Semi-conservative replication reveal an individual band of transitional weight after the initial replication, followed by two bands following the second replication (one of transitional weight, and the other at the 14N position). These two bands is observed in each following replication, with the transitional weight becoming lighter in color as the 14N band is seen to appear darker in color.

The real pattern gives an individual band that pinpoints to all molecules in an individual replicative cycle possessing the same constituents.

Dispersive replication, has its molecules to be a blend of old (15N) and new (14N) strands. Each replication raises the ratio of new to old strands as it explains the reason an individual band is shown raised (lighter in weight) with every replication.

4 0

3 years ago

A student plans on interviewing 15 principals in neighboring high schools. The student plans to collect data about the personal

Sonja [21]

The question is correct but the option is incorrect. The correct option is as follows:

a) Expedited Review b) Not Human Subjects c) Convened Review d) Exempt Review e) Full board review.

Answer:

Full board review.

Explanation:

IRB ( Institutional Review Board) is mainly responsible for the protection and maintains the ethics that are involved in the research related to humans and other animals.

The full board review requires more time that n the other type of review. This review is mainly done in the cases where the participants can get misleading information. This review includes the research that are based on to involve the judgement and involves less risk. The information given in the question explain the full board type review.

Thus, the correct answer is full board review.

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3 years ago

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