Answer:
The structure of their noses.
Explanation:
Catarrhines are distinguished from platyrrhines by several traits but the main distinctive feature between them, is the structure of their noses. This forms the basis of their names.
Platyrrhines are characterized by laterally-placed, rounded nostrils or flat-nosed while catarrhines have narrow, downward-facing nostrils or hooked-nosed.
Another distinguishing feature include their dental formulation which is 2.1.2.3 in catarrhines and 2.1.3.3 in platyrrhines.
The skull structure of catarrhines have frontal bone which make contact with the sphenoid bone unlike the platyrrhines.
Generally, catarrhines are much bigger in size than platyrrhines.
One advantage of genetic engineering is the production of valuable proteins: recombinant DNA made possible the use of bacteria to produce proteins of medical importance such as genetically engineered human insulin which is of great importance.
Another advantage is the production of vaccines. Vaccines produced by genetic engineering offer an advantage that the microbial strains from which proteins are extracted do not contain complete viruses and thus there is no risk of accidental inoculation with live virus.
Yes, it is B, because A population is
a sum of all the organisms of the same group or species.
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Meiosis I progresses through the following stages: prophase, metaphase, anaphase, and telophase.
Meiosis is a type of cell division that results in the production of four gamete cells and a 50% reduction in the number of chromosomes in the parent cell. To develop egg and sperm cells for sexual reproduction, this process is necessary. In sexually reproducing organisms, meiosis is a kind of cell division that results in a reduction in the number of chromosomes in gametes (the sex cells, or egg and sperm). Body (or somatic) cells in humans are diploid, meaning they have two sets of chromosomes (one from each parent).
In meiosis I following are the stages:
- During the interphase, two complete sets of chromosomes that are identical to one another are produced from the cell's DNA.
- Under a microscope, the replicated chromosomes condense into X-shaped structures during prophase I.
- Chromosome pairs align themselves side by side along the cell's equator during metaphase I.
- After that, during anaphase I, the meiotic spindle separates the pair of chromosomes, pulling one chromosome to one pole of the cell and the other chromosome to the other.
- The chromosomes finish moving to the cell's opposite poles during telophase I and cytokinesis.
To know more about meiosis refer to: brainly.com/question/13050419
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