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vekshin1
3 years ago
11

How does human evolution or natural selection relate to the susceptibility of disease?

Biology
1 answer:
SOVA2 [1]3 years ago
8 0
They relate because they show that during both natural selection and human evolution u could get a disease during both 
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Indicate whether the following outcomes of cell division are observed in mitosis only, meiosis only, or both mitosis and meiosis
serious [3.7K]

Answer:

A. Both in mitosis and meiosis (II)

B. Mitosis

C. In both

D. Meiosis

E. Mitosis

Explanation:

Prior to every case of cell division in both mitosis and meiosis, the cell always ensures to duplicates its contents including its chromosomes. In both cases of cell division, the sister chromatids separates, apart from in meiosis I where homologous chromosomes separates to opposite poles. Only one cellular division occurs in mitosis which is involved in the growth and development of the diploid individual but in meiosis, two divisions takes place in the gametes (both male and female) to ensure that the haploid number of chromosomes is transfered from both parents each to the offspring ensuring a constant diploid offspring. Thus a diploid parent cell always produces a haploid daughter cell in the gametes during meiosis. In mitosis, the daughter cells are always identical to the parents cells.

4 0
4 years ago
Which structure is the initial entry way for air to enter the respiratory system?
Alexxx [7]
It is the nose I think.
6 0
3 years ago
Describe the genetic makeup of the offsprings of asexual reproduction.
WARRIOR [948]

Answer:

They are genetically identical to the parents and only differ if a genetic mutation occurs.

Sexual reproduction involves two parents and produces offspring that are genetically unique.

The greater the genetic variation, the better change that an individual in the population have a favorable gene that can help survival.  Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population.

Explanation:

6 0
3 years ago
Cite the three main types of RNA and describe briefly the function of each.
sveticcg [70]

Answer:

mRNA: Carry genetic information from DNA to protein; serve as template for protein synthesis.

tRNA: Serves as adapter molecule and deliver specific amino acid from the cell pool to the mRNA-ribosome complex.

rRNA: Structural component of ribosomes.

Explanation:

There are three types of nongenetic RNAs: mRNA, tRNA, and rRNA.  

1. The messenger RNA (mRNA) is formed by the process of transcription in the nucleus. Transcription uses template strand of DNA to specify the nucleotide sequence in mRNA. The mRNA enters cytoplasm to join ribosomes. The nucleotide sequence of mRNA serves as a template and specifies the amino acid sequence of proteins.  

2. The transfer RNA (tRNA) serves as an adapter molecule during the process of protein synthesis and binds to the specific amino acids to deliver them to the protein-synthesizing machinery. The anticodon of tRNA binds to the complementary mRNA codons.  

3. The ribosomal RNA (rRNA) serves as structural components for ribosomes. Each of the subunits of ribosomes is made up of rRNA and proteins.  

8 0
3 years ago
Please Help_Biology
frosja888 [35]
Gene (DNA) expression would be B
4 0
3 years ago
Read 2 more answers
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