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Mkey [24]
3 years ago
11

4 What is a difference between prokaryotic and eukaryotic cells? A. Prokaryotic cells always have cell walls, but eukaryotic cel

ls do not. B. Eukaryotic cells do not have membrane-bound organelles, but prokaryotic cells do. C. Prokaryotic cells do not have a nucleus, but eukaryotic cells do. D. Organisms with eukaryotic cells are always multicellular, but organisms with prokaryotic cells are not.
Biology
1 answer:
Natasha2012 [34]3 years ago
7 0

Answer:

d

Explanation:

i learned this a week ago

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How does latitude affect climate
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<span>Climate Changes with Latitude. Places located at high latitudes (far from the equator) receive less sunlight than places at low latitudes (close to the equator). The amount of sunlight and the amount of precipitation affects the types of plants and animals that can live in a place</span>
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2 years ago
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_______________ can be accidental or intentional, and it can cause erosion.
maksim [4K]
Fire can be accidental or intentional, and it can cause erosion.
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3 years ago
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Fruit color in a particular plant is controlled by a set of three quantitative trait loci (i.e., QTLs or polygenes), that work i
tankabanditka [31]

Answer:

1/8

Explanation:

Given that the trihybrid parents have AaBbCc genotype for fruit color. The trait is a quantitative trait i.e. each dominant allele will have an additive effect on it. In this case, AaBbCc and AABBCC will not produce same fruit color because AaBbCc has only three loci contributing to the color while in AABBCC all the six loci are contributing to the color. For an offspring to be exactly similar to the AaBbCc parents it should have the same genotype of AaBbCc.

The probability of Aa to come from a cross between Aa and Aa is 2/4 or 1/2

The probability of Bb to come from a cross between Bb and Bb is 2/4 or 1/2

The probability of Cc to come from a cross between Cc and Cc is 2/4 or 1/2

So the collective probability of AaBbCc offspring from a cross between AaBbCc and AaBbCc parents would be=

1/2 * 1/2 * 1/2 = 1/8

Hence, assuming no effects of the environment, 1/8 of the offspring will have the same fruit color phenotype as the trihybrid parent.

4 0
3 years ago
In vertebrates such as a chicken, a mouse, of a python, variation in the number of vertebrae in the spine is determined by Hox g
andriy [413]

Answer:

I think the answer is C.

Explanation:

C.

3 0
3 years ago
Phenytoin blocks the opening of voltage-gated na channels in neurons. therefore, this action has its primary effects on which pa
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Numerous antiepileptic medications, such phenytoin, have been designed to block voltage-gated sodium channels (VGSC) in neuronal membrane. In addition, multiple toxins and pharmacological modulators work by attaching to various biophysical states of the VGSC to cause their effects.  Depending on how modulatory agents act, some VGSC states are stabilized or destabilized, altering the channel's biophysical properties. The first anticonvulsant to successfully treat epileptic disorders without causing undesirable side effects such as brain drowsiness was phenytoin.

Phenytoin has been indicated to block high-frequency neuronal activity potentials from the inner vestibule of the pore, as demonstrated by electrophysiological research and site-directed mutation.

Frequency and voltage both affect phenytoin binding.

There are theories that phenytoin interferes with the late sodium current that sustains depolarizations in epilepsy by blocking non-inactivated channels.

To learn more about phenytoin click here

brainly.com/question/13386639

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