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ankoles [38]
3 years ago
12

Differentiate between positive and negative mass selection.

Biology
1 answer:
Eduardwww [97]3 years ago
7 0

Answer:

Positive selection involves targeting the desired cell population with an antibody specific to a cell surface marker (CD4, CD8, etc.). ... Negative selection is when several cell types are removed, leaving the cell type of interest untouched.

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suppose that a species of toads is introduced into a new environment in an attempt to reduce the population of insects.
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Explanation: Because the food chain needs to stay stable!

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3 years ago
Which of the following statements best provides evidence of the big bang theory?
Oxana [17]

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Explanation:

Galaxies seem to show a red shift which indicates that the galaxies are moving away from each other. This provides evidence for the Big Bang theory because the theory posits galaxies will keep moving away from each other.

This is because when an explosion happens, matter moves away from the point where the explosion happened. If the Big Bang happened therefore, galaxies will move away from the source which is why galaxies are moving away from each other.

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3 years ago
What temperature pattern do the isotherms show? temperatures increase from south to north. there is a zone of low temperatures i
777dan777 [17]

The temperature pattern which is being shown by the isotherms is that: D. temperatures increase from the center of the country toward the Southwest.​

<h3>What is an isotherm?</h3>

An isotherm refers to a line that is drawn on a map to join points that are having the same temperature, in order to show the distribution of temperature in a geographical area on Earth's surface.

Based on the weather map in the image attached below, we can infer and logically deduce that temperatures typically increase from the center of the country toward the Southwest.​

Read more on temperature here: brainly.com/question/2339046

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8 0
3 years ago
MRSA is Methicillin Resistant Staphylococcus Aureus. Methicillin used to be nicknamed "gorilla-cillin". Which of the following s
Reptile [31]

Answer:

4. Methicillin is a strong antibiotic and MRSA developed resistance to it, making it harder to treat.

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MRSA was first discovered in 1961. It's now resistant to methicillin, amoxicillin, penicillin, oxacillin, and other common antibiotics known as cephalosporins.

7 0
3 years ago
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3 years ago
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