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Vesnalui [34]
3 years ago
8

Which are specific to just prokaryotes, or just plants, or just animals? drag the appropriate items to their respective bins. he

lpreset lack a cell walllysosomeschloroplastsphotosynthetic membranesvacuolesthe nucleoidmagnetite-containing structuresflagella and fimbriae?
Biology
1 answer:
balu736 [363]3 years ago
7 0
<span>Prokaryotes have magnetite-containing structures, nucleoid (their version of a nucleus), fimbriae. Animals have lysosomes. Plant cells have chloroplasts (make the plant cells green, produce energy for plants), photosynthetic membranes (produce energy for plants), cell well. Flagella can be found in prokaryotes and animal cells but for a simpler biology class, I would put it with prokaryotes.</span>
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Use the mechanisms of meiosis to explain why most mules are sterile.
Tema [17]

Answer:

3. An even number of chromosomes are required for synapsis during prophase I and proper pairing during metaphase

Explanation:

Mules are hybrids of a cross between a female horse and a male donkey. Horses contain 64 chromosomes while donkeys contain 63 chromosomes in their somatic cells respectively. This means that they each produce 32 and 31 chromosomes respectively during meiosis. A mule, hence, contains 32+31= 63 chromosomes in their somatic cells.

This chromosome number in mules are uneven for meiosis to occur because meiotic division requires that an even number of homologous chromosomes pair together in a process called SYNAPSIS during prophase I of meiosis I. This is impossible in a mule because of the uneven number of chromosomes in its cells.

Also, during metaphase of meiosis, the homologous chromosomes need to be properly aligned at the equator for separation to occur. This is also impossible in a mule considering the number of chromosomes that don't add up.

Due to this reason of unevenness in the number of chromosomes present in a mule, meiosis will not occur and if meiosis (gamete formation) does not occur, reproduction cannot take place. Therefore, the mule is a sterile species i.e. cannot produce offsprings via sexual reproduction.

4 0
3 years ago
Interneurons receiving input from sensory neurons are located in the ________.
alisha [4.7K]

Answer:

Dorsal horn

Explanation:

The sensory neurons cell bodies are present in dorsal horns. The front side of spinal cord consist of two arms of it. The ventral horn is the centrally located grey matter with motor neurons cell bodies.

The dorsal horns are located at each spinal cord levels that are four in number. The sensory nuclei is present in dorsal horns that perceive somatosensory information. The information is then transferred to midbrain and diencephalon. Thus, Interneurons receiving input from sensory neurons are located in the dorsal horn.

4 0
3 years ago
Are the 1st three correct and help.with the rest?
klasskru [66]
Hello there,
#5- Proteins
#6- is incorrect the answer is-->> ATP synthesis 
#8- Photosynthesis
#9- Cell recognition components

Hope this help,
Have a nice day!
8 0
3 years ago
Where are acids found on the pH scale?
andriy [413]

Answer:

Substances with a pH less then 7 are acids. So they are 0-7

Explanation:

Hope this helps :)

5 0
2 years ago
Which best summarizes the process of protein synthesis?
tatyana61 [14]

Answer:

RNA instruct dna to make protien

6 0
2 years ago
Read 2 more answers
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