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leva [86]
3 years ago
8

I’m not sure what it means for the cell membrane to be semi-permeable

Biology
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.

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A peacock spreading its tail to attract a mate is sending a(n) _____ stimulus. learned innate external internal
Klio2033 [76]

Answer:

External

Explanation:

The Tail is spreading outside of the peacock  (Externally)

4 0
3 years ago
How has the sellement et humans in agricultural societies impacted the environment?
ValentinkaMS [17]

Answer:

They have increased the amount of certain organisms (a lot of crops and such) and made the soil healthier. Also, other organisms that may feed on this are having more food.

Explanation:

5 0
3 years ago
While caring for a patient undergoing suctioning, the nurse guides the catheter along the naris floor to avoid the turbinates. w
BARSIC [14]
There are choices for this question namely:

<span>1 Pulse oximetry of 90%
2 Body temperature of 99° F
3 Heart rate of 40 bpm
4 Respiratory rate of 20 breaths per minute
</span>
The correct answer is "heart rate of 40 bpm". A heart rate of 40 bpm is classified as bradycardia. Bradycardia is defined as a slow heart rate below 60 bpm. A heart rate below 50 bpm is more than alarming to the health practitioner and suctioning should be stopped to give way for immediate intervention. A oxygen saturation of 90%, while below normal range of 95%-100%, is still considered safe. A body temperature of 99 degrees F and a respiratory rate of 20 breaths per minute is considered normal.


7 0
3 years ago
Myrmecia pilosula was originally described as a single species, however, after closer examination, it was determined to consists
JulijaS [17]

Answer:

The correct answer is "34".

Explanation:

The ant Myrmecia pilosula is a special case of sexual reproduction, where the females produce gamete cells with half the chromosomes of the somatic cells and the males are haploids that transmit the whole number of chromosomes in their gametes. Therefore, the somatic cells of the hybrid female offspring that results from the cross of a female ant with 48 chromosomes and a male with 10 chromosomes would have 34 chromosomes. This result from half the number of chromosomes of the female (24) plus the total number of chromosomes of the male (10).

8 0
3 years ago
Can someone do #11 for me
harina [27]

Answer:

Sorry I can´t see that

Explanation:

4 0
3 years ago
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