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lions [1.4K]
4 years ago
12

Genetic variation, provided through sexual reproduction, offers more opportunity for offspring to survive in changing environmen

ts. What two aspects of meiosis provide sources of such variation?A. Mutation and fertilizationB. Crossing over and allelic exclusionC. Segregation and independent assortmentD. Crossing over and independent assortment of chromosomes
Biology
1 answer:
Phoenix [80]4 years ago
7 0

Answer:

Option D.

Explanation:

Crossing over is an important characteristic of meiosis which provides the genetic variation and various allelic combinations present in the offspring. Hence the answer is option D.

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DNA supercoiling means under or over winding of the DNA strand and basically is to become more condensed and more organized. Supercoiling is very important as it compacts the genetic code and as if that was not enough supercoiling also regulates and oversees the access the the genetic code.
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The endocrine system involves a number of organs and glands that secrete hormones. The posterior pituitary gland is responsible
wolverine [178]

Answer:

The characteristics that best describe SIADH is the ones explains below

Explanation:

(SIADH) or known as syndrome of inappropriate secretion of antidiuretic hormone is a disorder of impaired water excretion caused by the inability to suppress the secretion of antidiuretic hormone.

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3 years ago
The cytochrome c in both horses and pigeons differs from the human protein at 12 locations. Based on this data, you might infer
yuradex [85]

Answer:

Cytochrome c is an enzyme found in bacteria, fungi, plants and animals. Here it is given that the human amino acid sequence for cytochrome c differs at 12 locations from the sequence in horses and pigeons. This information might be useful for inferring in preliminary stages that horses and pigeons are closely related to each other since they both show similar amount of difference from humans.

However, this hypothesis is being made with respect to the the comparison between "humans and horses" and "humans and pigeons". To further test this hypothesis pigeons and horses should be directly compared to each other without the use of a third species like humans. Hence, the sequence for cytochrome c in horse and pigeon should be compared with each other rather than comparing to humans.

3 0
3 years ago
What season do birds call for mates and build nests
zalisa [80]

Answer:

the spring time is when they call for mates

7 0
3 years ago
Read 2 more answers
Carl Woese proposed the domain classification a. using shape to classify microbial species b. to divide the single-celled organi
goldfiish [28.3K]

Answer:

c. to account for two major and distinct prokaryotic groups in addition to eukaryotes.

Explanation:

Microbiologist Carl Woese compared the ribosomal RNA sequence of the small subunit of RNA. Various organisms have structurally different small subunit of the ribosomes. According to Woese the molecular composition of rRNA in closely related organisms should be more similar than in distantly related organisms. He analyzed the 16S rRNA of various organisms and observed that there are two distinct groups of prokaryotes. He divided the prokaryotes among two domains: Bacteria and Archaea. He placed all the eukaryotes in the domain Eukarya.

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4 years ago
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