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3 years ago

Suggest an explanation for why using a condom helps to limit the transmission of HIV,

Biology

1 answer:

Cloud [144]3 years ago

5 0

Answer and Explanation:

HIV is a sexually transmitted disease that is caused by AIDS, a virus. Malaria is a protozoan disease that is cause by <em>plasmodium spp</em>. Both the virus and sporozoites of plasmodium live inside humans. However, in malaria, the sporozoites are inactive form of the parasite and they live in the human liver. The human being acts as an intermediate host for the life cycle to be complete.

In HIV, the virus incorporates its DNA into the host(human) genome and uses the resources to produce proteins that are found in the blood. Using a condom helps limit the transmission of HIV because the virus lives in the blood cells but does not affect the transmission of malaria because the sporozoites live in the liver and other organs. HIV can be transmitted sexually, transfusion with contaminated blood, sharing of infected needles and syringes while malaria is only transmitted through a mosquito bite.

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In chickens, comb shape is determined by genes at two loci (R, r and P, p). A walnut comb is produced when at least one dominant

mariarad [96]

Answer:

in the obtained options, there is no dominant gene for the crossed pairs, therefore, no answer would be correct, however, when assigning a dominant character to the P gene, the correct answer would be:

E. Rr pp *rrPp

Explanation:

According to the information obtained we deduce:

Comb shape is produced by R and P

Comb of walnuts with an R or a P

Pink comb: 1 dominant P and R at the first locus and 2 recessive at the next locus

Pea comb: 2 recessive at the start and one dominant in the next position

1 single comb: 2 recessive at both loci

Rr pp × rr Pp will produce from the interbreeding: 2 walnuts, 1 single and 1 pea offspring.

We deduce that for the pink comb the genotype is: Rrpp

and for the pea comb it is rrPp

Rr pp × rr Pp generates crosslinks containing RrPp, rrPp, rrpp as children in a 2: 1: 1 ratio.

4 0

3 years ago

A group of two or more organs that work together to perform a specific function.

jekas [21]

C. Organ System

Like said in the definition above, an organ system is a group of organs working together to perform a specific function for the organism.

hope this helps !! have a great day :))

6 0

2 years ago

Read 2 more answers

3/10

tresset_1 [31]

Answer: It's known as the continental drift :)

Explanation: "Pangea's existence was first proposed in 1912 by German meteorologist Alfred Wegener as a part of his theory of continental drift. Its name is derived from the Greek pangaia, meaning “all the Earth.”" (copied from google)

3 0

3 years ago

when a planarian(a type of worm) is cut in half each half usually grows back into a complete worm over time.) this situation mos

timama [110]

I think that that the answer should be C asexual reproduction of a single-celled organism

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3 years ago

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What group of animals has flexible hands and feet, large brains in relation to body size, forward-looking eyes, and arms that ca

Lana71 [14]

<h2>Primates </h2>

Explanation:

Primates are a group of animals has flexible hands and feet, large brains in relation to body size, forward-looking eyes, and arms that can rotate in a circle around the shoulder joint

Primates include the lemurs,lorises,monkeys,apes and humans
The order Primates, with its 300 or more species, is the third most diverse order of mammals, after rodents and bats
The Primates order is divided informally into three main groups: prosimians, monkeys of the New World, and monkeys and apes of the Old World
All primates have five fingers (pentadactyly), a generalized dental pattern, and a primitive body plan
Another distinguishing feature of primates is fingernails
Opposing thumbs are also a characteristic primate feature
When compared with body weight, the primate brain is larger than that of other terrestrial mammals, and it has a fissure unique to primates that separates the first and second visual areas on each side of the brain
The eyes face forward in all primates so that the eyes visual fields overlap
Fossils of the earliest primates date to the Early Eocene Epoch (56 million to 40 million years ago) or perhaps to the Late Paleocene Epoch (59 million to 56 million years ago)

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3 years ago