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Gnom [1K]
3 years ago
10

Evidence that cytoskeletal elements have ancient origins comes from the: sequence similarities of cytoskeletal elements when com

paring distantly related organisms. presence of cytoskeletal elements in both eukaryotes and prokaryotes. ability to form functional hybrid microfilaments from actin monomers taken from distantly related organisms. observation that both prokaryotes and eukaryotes use cytoskeletal elements to assist cell division. All of these choices are correct.
Biology
1 answer:
Gnesinka [82]3 years ago
3 0

Answer:

All of these choices are correct.

Explanation:

A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.

A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.

Generally, cells have the ability to independently replicate themselves. In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles in all living organisms such as trees, birds, and bacteria include; nucleus, cytoplasm, cell membrane, golgi apparatus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, vesicles, cytoskeleton, etc.

Cytoskeleton refers to a structure consisting of filaments and tubules which help to maintain internal organization and support the shape of the cells. It comprises of three (3) main filaments and these includes: actin filaments, intermediate filaments and microtubules.

Generally, there are numerous evidence that cytoskeletal elements have ancient origins and they include all of the aforementioned facts.

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Based on the anatomical and physiological differences between an infant and an​ adult, which finding would suggest respiratory d
frosja888 [35]

Answer: Excessive movements of the walls of the  abdomen

Basically babies belly breathe, that is they undergo abdominal pattern of respiration( instead of the abdomino- thoracic pattern in  adult), through their abdomen.

<u>This is because,  their thoracic walls are not fully functional to undergo  the normal adult mechanisms  of breathing</u>.

<u>The ribs are short in length due to incomplete ossification. They curve out wards, at low angle, their sternum, is shaped horizontally.</u>

These features reduce the activities   of the inter coastal muscles and the thoracic cage  in the mechanism of  infants breathing,compare to the long ribs, obliquely shaped rib cage,  with lower  sternum  of  adult which  permit the  abdominal-thoracic  breathing pattern.

Therefore ,when the diaphragm distends during breathing ,its movement pushes the organs of the abdomen down; because infants have rapid respiratory  rates, the distends created  rapid  expansion and contraction of the walls of the abdomen to gain enough abdominal pressure.

This together with the movement of  organs of the abdomen   from  the  pathways of diaphragm  created the  excessive  movements of the abdominal walls. This rapid abdominal wall movements creates discomfort and distress for the infant during this mechanisms.

Explanation:

7 0
3 years ago
In nerve cells, the centrosome is located near the nucleus. Vesicles move from near the nucleus to the end of long extensions (a
lord [1]

Answer:

Plus end and kinesin.

Explanation:

Three important cytoskeleton components are microtubules, microfilaments and intermediate filaments. Microtubules are the polymer of tubulin and plays an important role in the movement of cell organelles and its structure.

Microtubules shows the process of polymerization and depolymerization at different ends. The plus end shows the polymerization and minus end shows the depolymerization process. The kinesin protein is required for the process of polymerization.

Thus, the correct answer is option (D).

7 0
3 years ago
8. Which pattern of inheritance is responsible for a wide range of phenotypes that result from individual organisms having many
Romashka [77]
The answer is D Multiple alleles 
3 0
3 years ago
Read 2 more answers
Please help!!
MariettaO [177]

Answer:

C cascading effect

Explanation:

i checked all the options of A B C D

3 0
2 years ago
List the outputs of (what is produced through) photosynthesis
vitfil [10]

Answer:

glucose and oxygen:C6H12O6 and 6O2 respectively

5 0
3 years ago
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