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3 years ago

Why would a compound that interferes with bacterial cell wall synthesis be useful for treating a bacterial infection?

1 answer:

7 0

<span>If a compound could interfere with bacterial cell wall synthesis, it would destroy the cell. The bacteria would not survive failure of the cell wall. This compound would be useful in the treatment of bacterial infection as it would destroy the infection on a cellular level.</span>

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How frequently can scientists prove that their hypotheses are true?

ZanzabumX [31]

Scientists prove their hypothesis is true about Scientists can never "prove" their hypotheses are true, because some future experiment, possibly using new technology not currently available, might show the hypothesis to be false after all.

4 0

2 years ago

6. A scientist measures the circumference of acorns in a population of oak trees

melisa1 [442]

Answer:

6. 2 cm

8. Greater than 2 cm and less than 2 cm

Explanation:

Complete Question

6. A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. What would you expect the most common circumference(s) to be after 10 generations of stabilizing selection?

-2 cm

-Greater than 2 cm or less than 2 cm

-Greater than 2 cm and less than 2 cm

-Can't tell from the information given

8. Refer to question 6, but this time answer what you would expect after 10

generations of directional selection.

-2 cm

-Greater than 2 cm or less than 2 cm

-Greater than 2 cm and less than 2 cm

-Can't tell from the information given

Solution -

6. In an stabilizing selection, the average trait of a given population is favored over extreme values. Hence, it can be said that one specific trait is over presented in a given population. For example – uniform human birth weight, number of eggs a bird lay etc.

Here in this case if most common circumference is 2 cm , then the tree population will try to have this trait as a stabilizing trait.

Thus, option A is correct

8. In a directional selection, the genetic variation decreases as per the environmental change. And hence the average trait will not be selected. Instead traits either higher or lower the average values will be preferred.

Thus, option C is correct

3 0

2 years ago

What are the three inference (conclusions) Darwin made based on his observations?

Aleksandr [31]

Answer:

1. A Struggle for Survival

2. survival will reproduce

3. Superior adaptive variation

Explanation:

1. Observation: overproduction of offspring that can possibly survive.

CONCLUSION: A Struggle for Survival, most of this offspring fight for food and water.

2. Observation: variation in species: member of the same species have different ways of identification, which are color, sex, e.t.c

CONCLUSION: Those individuals that survive and reproduce do so in consequence of "superior adaptive variation" (they are "more fit")

3. Observation: Variation heritable through selection: most survival pass there favourable adaptation to their offspring.

CONCLUSION: Superior adaptive variation will be passed on to offspring generation.

reference: https://www.mun.ca/biology/scarr/4250_History_II.html

6 0

2 years ago

Drag each label to the correct location on the chart

katovenus [111]

Answer:
1. Breathing moves air in and out of the lungs.
2. Oxygen diffuses from alveoli in the lungs into capillaries.
3. Oxygen enters red blood cells, where it binds to the protein hemoglobin.
4. Oxygen diffuses from the blood to the body's tissues, and carbon dioxide
diffuses from the tissues to the blood.
5. Carbon dioxide leaves the body when exhale.

4 0

2 years ago

Functions of the cell membrane include physical isolation of the cell from its surroundings, regulation of exchange, structural

Radda [10]

Answer:

Apart from the mentioned functions of a cell membrane, one of the prime functions of a cell membrane is to take part in the communication between the cell and its environment. The cell membrane is one of the most essential components that take part in communication and ensures that the messages are received and decoded appropriately.

A cell membrane comprises various proteins that plays an essential role in ensuring communication between the cells. These proteins obtain chemical information from other cells known as signaling molecules. When these molecules combine with the cellular membrane’s proteins they stimulate a modification or change in protein conformation, which then transmits the information into the cell and instigates a particular cellular reaction.

8 0

3 years ago