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3 years ago

A thin, flexible, semipermeable barrier around the cell which regulates what enters and leaves the cell.

Biology

2 answers:

raketka [301]3 years ago

5 0

That would be Cell membrane. :-)

Citrus2011 [14]3 years ago

3 0

Answer:

A thin, flexible, semipermeable barrier around the cell which regulates what enters and leaves the cell is cell membrane. The plasma membrane is another name of the cell membrane.

The plasma membrane is semipermeable because it allow only some molecules to enter and exit the cell. Small polar molecules can easily cross the plasma membrane along the concentration gradient diffusion.

For the passage of large, non-polar and charge molecules plasma membrane have carrier proteins which can be used to transport the molecules along the concentration gradient by facilitated diffusion or against the concentration gradient by active transport. Therefore, the correct answer is the cell membrane.

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This primate lives in the grassy highlands of Eastern Africa. It has arms and legs that are relatively equal in length and a sho

Serga [27]

Answer:

On the basis of the given information, that is, the ape exhibiting small incisors and biphodant molars, shows that they generally consume fruits and seeds as the prime part of their diet. Thus, mainly the apes feed on fruits, leaves, and seeds, thus it makes them vegetarian.

However, it has also been observed that canine teeth are found in both males and females, though they are larger in males. This shows that apes can consume meat from small birds and animals occasionally.

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3 years ago

1. Psychologists have used four perspectives in their efforts to explain motivation. These include an emphasis on instincts, opt

ololo11 [35]

Answer:

A) drive reduction

Explanation:

Motivation is the urge that fuels and directs human with the energy to accomplish a given task. Motivational theory is accustomed with the role of searching for what drives individuals to work towards a goal or a task.

The drive reduction theory explains physiological ideology required bring out an aroused tension state that motivates an organism to satisfy the need.

Instincts Theory reflects innate and fixed pattern of complex behavior in animals. For example, making holes of crabs for safety.

Optimum Arousal Theory drive people to engage in certain activities in the quest to keep up with an optimum level of physiological arousal.

Hierarchy of motives: According to Maslow's pyramid, hierarchy of motives is explained based on need to satiate or quench the least physiological needs in order to be active before subsequent level needs.

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3 years ago

The hematopoietic stem cell gives rise to..

r-ruslan [8.4K]

Answer:

The answer is Abstract.

Explanation:

The hematopoietic stem cell gives rise to.

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6 0

1 year ago

5. In humans, normal skin pigmentation is due to a dominant allele (A), while the recessive allele (a) causes albinism (lack of

MrRa [10]

Answer:

There are 2 possible punnett squares. In the case Kendal is a carrier, cross Aa with aa for Kent. In the case Kendal is not a carrier, cross AA with aa.

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3 years ago

One of the advantages of asexual reproduction is that it is a

saul85 [17]

Awnser : C Lacks genetic variation

Explanation : The major disadvantages of asexual reproduction are: Lack of diversity. Since the offsprings are genetically identical to the parent they are more susceptible to the same diseases and nutrient deficiencies as the parent. All the negative mutations persist for generations.

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3 years ago