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vredina [299]
2 years ago
5

Guys i really need help!

Biology
1 answer:
koban [17]2 years ago
4 0

Answer:

F

Explanation:

all the chromosomes in the nucleus replicate their DNA to make identical copies

i hope that i got it right

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Which of the followingcharacteristics determines when the refractory period ends?
kondor19780726 [428]

Explanation:

<u>-how long it takes for the voltage-gatedNa+ channels to close at the end of an action potential</u>

Neurons have unique structures which aid in facilitating communication by sending and receiving electrical signals very efficient.

The refractory period describes a period between the initiation of an action potential where Na+ channels are closed, and immediately after the action potential’s peak. Action potentials would require an influx of more positively charged ions; these must be more than a specific threshold in order to have the cells send along more action potentials which helps with figuring out stimulus intensity.

Potassium ions readily diffuse out of the cell more quickly than sodium due to the presence of more channels which allow for potassium leakage. The sodium pumps in neuronal membranes bring more Na+ than K+ ions into the cell; with every three sodium ions pumped out two potassium ions are brought in- this is in order to maintain the negatively charged membranes within the cell along with the resting potential.

Learn more about the autonomic nervous system at brainly.com/question/10386413

Learn more about neurotransmitters at brainly.com/question/9424160

Learn more about homeostasis at brainly.com/question/1601808

#LearnWithBrainly

3 0
4 years ago
Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. Assume all
PolarNik [594]

Answer:

C) all chinchilla

Explanation:

As we know that dominance of alleles for the coat color in rabbits goes like this:

                                          C+ > Cch > Ch > C.

  • The allele for full colour or agouti is  designated as C+.
  • Allele for mutant coat color  silvery- gray coat-chinchilla is Cch.
  • Allele for “Himalayan” coat is called ‘Ch
  • Albino rabbits have whole white coat and allele for this is c

If we cross homozygous chinchilla with homozygous chinchilla the cross will look like this:

P1:                                            chinchilla x chinchilla

P1:                                             Cch Cch    X   Cch Cch

F1:                                          Cch Cch       :       Cch Cch

Since all offspring have Cch Cchgenotype that is foe chinchilla phenotype  it means that all the offspring will have chinchilla phenotype that makes option C correct.

Hope it help


3 0
3 years ago
What is the purpose of the stripes kn the giranium plant
kipiarov [429]

Answer:

the plant produces essential oils in small glands around the foliage and flowers.

Explanation:

3 0
3 years ago
During a visit to a hospital, a child receives the oral polio vaccine. He then returns to his distant village. Sometime later a
dybincka [34]

Answer:

Because the child was vaccinated against this disease, the germs are not able to travel from one person to the other, and the family in this case, is less likely to get the disease. Even his siblings, that didn't get the vaccine, will get some protection from getting sick. This is known as community immunity.

Explanation:

6 0
3 years ago
Cyclostomata are fish _____. made of cartilage without a jaw made of bone
Stels [109]
Lamprey and hagfish are jawless fish, with skeletons composed of cartilage. They do not have scales and are considered primitive fish. They are in the superclass cyclosystoma.
3 0
3 years ago
Read 2 more answers
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