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pychu [463]
3 years ago
7

Some molecules are too big to pass through the phospholipid bilayer of the cell membrane. These molecules need to pass through _

_______________ that are embedded in the cell membrane.
Biology
2 answers:
pogonyaev3 years ago
8 0
These molecules need to pass through specific proteins or transmembrane proteins embedded in the cell membrane. A specific type of an integral membrane protein.
Aliun [14]3 years ago
8 0

Answer:

The blank can be correctly filled with transmembrane proteins.

Transmembrane proteins, as the name suggests, are the proteins present across the phospholipid bilayer

These proteins form channels or pumps across the plasma membrane and help in the transport of charged ions and large biomolecules across the plasma membrane.

For example, GLUT transporter helps in the transportation of glucose.

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55. Which of the following molecules can be used as a substrate for cellular respiration?
My name is Ann [436]
I think it is proteins
4 0
2 years ago
The moth species Biston betularia has two color morphs, or variants. One has a speckled white and black color, while the other i
Oksana_A [137]

Answer:

D. Changes in the environment changed each morph's ability to evade predation in different ways.

Explanation:

The moth species<em> Biston betularia</em> has two color morphs, or variants. One has a speckled white and black color, while the other is all black. Over the period of time, the distribution of moths dramatically changed between 1900 and 1950 in such a way that black morph became dominant but speckled morphs became very much declined in abundance. The reasons behind this change was heavy industrial pollution in UK between 1900 and 1950.

When the environment became very polluted, dark and blackish, the speckled moth had more chanced of getting eaten by predators thats why they declined in number  as compared to black morphs. On the other hand, backgrounds of grime and soot made black morphs less visible to the predators and they survived well. This is an excellent example of natural selection that only those specie better survive that have the ability to cope better with adverse environmental fluctuations.

Therefore, option D is best option.

Hope it help!

8 0
2 years ago
The graph shows the changing levels of hormones during menstruation and ovulation. What is the general trend for hormones after
Vladimir79 [104]

Answer:

Hormone levels generally decrease.

Explanation:

<em>The graph showed that hormone levels after ovulation generally decrease.</em>

The menstrual cycle of women generally have 3 phases which include:

  1. <em>The follicular phase</em>
  2. <em>The ovulatory phase</em>
  3. <em>The luteal phase</em>

The follicular phase is characterized by low levels of oestrogen and progesterone and a slightly high level of follicle stimulating hormone which ensures that follicles within the ovary develop.

The ovulatory phase is characterized by a surge in the luitenizing hormone (which stimulates the release of eggs) and follicle stimulating hormone with a decrease in the level of oestrogen and a gradual increase in the level of progesterone.

The luteal phase is characterized by a general decrease in the levels of luitenizing hormone and follicle stimulating hormone while oestrogen level may remain high.

5 0
2 years ago
Read 2 more answers
What type of plankton is the major portion of the baleen whale's diet?
Lostsunrise [7]
Zooplankton is what I would put
3 0
3 years ago
Single-celled organisms are able to maintain internal stability because they :
irinina [24]
That would be C
I hope this helped you.
7 0
2 years ago
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