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Paraphin [41]
3 years ago
13

How can human selectivity alter the traits of organisms?

Biology
1 answer:
Katena32 [7]3 years ago
5 0

Answer:

The concept predates the term; Plato suggested applying the principles of selective breeding to humans around 400 BC. Early advocates of eugenics in the 19th century regarded it as a way of improving groups of people. In modern usage, the term eugenics has close ties to scientific racism and white supremacism.

Explanation:

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Donor Blood Type Recipient Blood Type A- Successful
tekilochka [14]

Answer:

The first blood transfusion in which the donor blood type is A+ and recipient blood type is A- would not be successful as the donor blood is A+, which signifies that the blood comprises both Rh factor and antigen A, while the recipient blood group is A-, which signifies that the blood does not comprise Rh factor and possess only antigen A. Therefore, at the time of transfusion, the Rh factor of donor blood will be regarded as a foreign body by the recipient, and thus, will generate antibody against the donor Rh factor provoking immune rejection and agglutination.  

On the other hand, the second blood transfusion in which the donor blood type is O- and the recipient blood type is AB+, the blood transfusion would be successful as the blood group O- is a universal donor, as it neither possesses any A or B antigen nor Rh factor. This blood group is accepted by all the blood group recipients.  

5 0
3 years ago
Which of the following statements is true?
KIM [24]

Secondary consumers receive less energy from the food chain than primary consumers.

Primary consumers are herbivores, meaning they eat the plants that have 100% energy.

Secondary consumers are either omnivores or carnivores. This means that they eat both animals and plants. In the situation that a secondary consumer is a carnivore, the secondary consumer is receiving less energy from the primary consumer.

Hope this helps!

3 0
3 years ago
Read 2 more answers
Some leaves modify into spines, how does this modification help plants survive?
barxatty [35]
Spines primarily have a protective function in plants. The spines can be sharp, and form a physical barrier against herbivores which may want to feed on the plant. Spines however also have other benefits. The spines on a jumping cactus allow segments of the cactus to stick to passing large animals or humans, thereby allowing the cactus to spread to other areas through asexual propagation. Spines are modified leaves, and spines have a much lower surface area than leaves, and therefore can reduce transpirative loss of water by the plant during harsh droughts. Some trees in alpine regions, such as pine trees, have developed spine-like leaves to prevent the accumulation of snow in the branches.  
7 0
3 years ago
A victim of foreign body airway obstruction become unresponsive. what is your first course of action?
Anna11 [10]
Answer:
Use a head tilt (tilting the head backward) and chin lift to prevent the tongue from obstructing the upper airway, and look for the foreign body that is causing the obstruction.

Explanation.
The backward head tilt and chin lift will prevent the tongue from obstructing airflow.
If the foreign object can be seen and removed, do so. Usually, it is not wise to use the fingers unless the foreign object is visible and accessible.

The next step is to perform CPR because the patient is unresponsive.
5 0
3 years ago
What provides an explanation for the presence of mitochondria and chloroplasts in present day cells?
Sav [38]
The general theory is that mitochondria and chloroplasts began initially as separate cells that were "eaten" by larger cells, but not digested and simply passed on due to their advantages.<span />
3 0
3 years ago
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