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Margarita [4]
3 years ago
8

PLEASE HELP!!!!!! WILL GIVE BRAINLIEST!!!!!!!

Biology
2 answers:
Basile [38]3 years ago
6 0

Answer:

''Stem cells makes copies of itself whereas differentiated cells can't.''

Explanation:

stem cells function differently from differentiated cells because the stem cells divide and make copies of itself. It has the potential either to remain a stem cell or become another type of cell such as a muscle cell, a red blood cell, or a brain cell if the body needed while on the other hand, differentiated cells are specialized cells which performs specific functions and unable to divide.

Tresset [83]3 years ago
5 0

Answer:

Stem cells are unspecialized cells that can make copies of themselves without limits when needed whereas differentiated cells can't, instead they become specialized as their body develops.

Explanation:

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What two types of amino acid sequences are needed in a protein to mediate post-translational farnesylation?
Hitman42 [59]

Answer:

Post translation farnesylation may be defined as a type of prenylation in which the isoprenyl group is added to the cysteine residues of the protein. This modification is important for protein and membrane interaction.

Basically two types of amino acid are required for the farsenylation modification. The signal peptide sequence is the short amino acid sequence that targets the ribosome in the endoplasmic reticulum. The sequence is generally lysine, aspartic acid, glutamic acid and leucine. The second sequence must be Caax (C is cysteine, a is aliphatic amino acid and X consists of C terminal amino acid.

8 0
3 years ago
In a common reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, where does the sign
kobusy [5.1K]

In a reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron. The answer is motor neurons.

<h3>What is the reflex arc?</h3>

The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts.

In general terms,

1) A stimulus of varying nature reaches the body.

2) The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-.

3) The CNS processes the information and sends another signal as a response to the stimulus.

Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.

The neurons involved in the mechanism are:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Mode of Action:

  • <u>Ascending branch</u>

The stimulus reaches the body and is received by the specialized sensory receptors.

Afferent neurons, placed in the dermis and epidermis, receive this information from receptors, react and send it to the central nervous system as nerve impulses.

  • <u>Descending branch</u>

Interneurons in the CNS, process the information and send a motor response.  

Efferent neurons carry the response from the CNS to the effector organs, which might be either a muscle or a gland.

Finally, the target tissue responds to the stimulus as a contraction -muscle-,or as hormones release -gland-.

A motor neuron is formed by a cellular body, dendrites (cytoplasmic extensions that receive stimuli from other cells), and a long axon that is capable of conducting the electrochemical signals.

The axon brunches out into several extensions when it approaches the muscle.

At the end of each brunch, the axon is inserted in the muscle fiber surface, composing neuromuscular join.

This is the last part of the NS involved in the process before the muscle contracts.

After a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron, and from there to the effector.  

The corrct answer is motorneuron.

You can learn more about the reflex arc at

brainly.com/question/894334

#SPJ1

3 0
2 years ago
Precipitation falls because of _________.
nignag [31]
1. B.

2. C.

3. A.

4. B.

5. C.

6. C.

Hope this helps
3 0
3 years ago
. Creative Writing Assignment: View the image in the following link:
Aleks04 [339]

Answer:

As image is not provided,let's discuss about ecological succession.

Explanation:

Ecological succession can be described as the development of a community from its pioneer to climax community. There are two types of ecological succession:

Primary ecological succession: This type of succession occurs in lands where there was no life before or in lands where signs of life have completely been removed like an lava eruption. The rocks in this land are broken down and slowly, pioneer species begin to grow.

Secondary  Succession: This type of succession arises after a natural disaster like fire etc or after any human activity has wiped out the previous community which survived on this land. smalls shrubs and grass starts to grow back on this land, which is replaced by the intermediate species and finally with the climax community.

5 0
3 years ago
The evolutionary effects of genetic drift are greatest when _____.
KonstantinChe [14]

Answer: the actual size of the population is relatively small.

Explanation:

In relatively small populations, the phenomenon of genetic drift significantly may change the frequencies of the alleles in that population. This consequently affect the genetic structure of the population in context.

Whereas big populations doesn't significantly feel the shakings of this phenomenon because her effects are small and insignificant.

5 0
3 years ago
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