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iren2701 [21]
4 years ago
12

Which is an immune response?

Biology
1 answer:
amid [387]4 years ago
4 0

Answer:

The immune system protects the body from possibly harmful substances by recognizing and responding to antigens. Antigens are substances usually proteins on the surface of cells, viruses, fungi, or bacteria. Innate, or nonspecific, immunity is the defense system with which you were born.

Explanation:

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Fires are important to savanna ecosystems, but not to grassland ecosystems. Please select the best answer from the choices provi
garri49 [273]

The given statement is false.  

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The African savanna ecosystem refers to a tropical grassland with warm temperatures over a year, and with its highest seasonal rainfall in the summers.  


5 0
3 years ago
Read 2 more answers
Explain why a hydrogen atom can become either an ion or a part of molecule?
NikAS [45]

<span>If it loses that 1 electron (0 electrons, 1 proton, 1 neutron) it become an ion that is positively charge because it has more protons than electrons. [Ignore the neutrons] </span>

<span>If it gains an electron (2 electrons, 1 proton, 1 neutron) it becomes an ion that is negatively charge because it has more electrons than protons </span>

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<span>1 proton 1 electron <----- that is considered to be neutral </span>

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8 0
3 years ago
Which was the original source of atmospheric oxygen? Question 4 options: autotrophs cooling of Earth’s crust formation of the oc
Nuetrik [128]

Answer:

The answer is autotrophs

Explanation:

During the early days of the Earths life there was no oxygen but there was plenty of CO2 which the autotrophs took and used as food while discarding the excess which was the oxygen.

5 0
3 years ago
Buffalo have a somatic chromosome number of 60. Hybrids produced by crossing a buffalo and grizzly bear are called gruffalo, are
Keith_Richards [23]

Answer:

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Explanation:

Since the Gruffalo has a somatic chromosome number of 67 and the Buffalo has a somatic chromosome number of 60, we may infer that seven chromosomes from the Grizzly were not able to pair up with the chromosomes of the Buffalo. Checking the options, the only choice that has a suitable number is b. 37 chromosomes. If this is true, then the remaining 30 chromosomes were able to pair up.

5 0
3 years ago
Which metal has the lowest atomic weight of those listed here?
prohojiy [21]
A. Titanium. Titanium's atomic weight is 47.867 
8 0
3 years ago
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