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Firdavs [7]
3 years ago
7

Name three pathogens that are attacked by the immune system.

Biology
1 answer:
astraxan [27]3 years ago
3 0

Answer:

viruses, bacteria, fungi, and parasites

Explanation:

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Gradual changes in the frequency of diseases over long periods are known as
Kaylis [27]
Gradual changes in the frequency of diseases over long periods are known as SECULAR TIME TRENDS. For example, the rate of mortality in USA due to coronary heart diseases over a period of time. Onset of puberty in girls is also a secular time trend.
Secular time trend is also referred as Secular Variation and Secular Drift.
6 0
3 years ago
The following statements refer to a comparison of reproduction in ferns vs. flowering plants. Indicate whether each statement is
Dennis_Churaev [7]

Answer:

Both ferns and flowering plants produce spores at some point in their life cycles. True

Only ferns have a gametophyte as part of their life cycle. False.

Only flowering plants produce pollen grains. true

Both a tree and a large fern plant are diploid sporophytes. True

Explanation:

Yes, both ferns and flowering plants produce spores in their life cycles. In fern plant, it produce spores on the underside of the leaves whereas in flowering plant, there are two types of spores such as microspores and megaspores. Both ferns and flowering plants have gametophyte as part of their life cycle. Flowering plants produce pollen grains whereas non-flowering plants produce spores to continue their generation. Both tree and large fern plants having diploid sporophytes which is a necessary part of their life cycle.

7 0
3 years ago
The r groups on amino acids determine their unique characteristics. how does an amino r-group on an amino acid behave at ph 7 in
Leviafan [203]

It serves as a base and gains a proton, which charges it positively.

What is amino acid?

Proteins are made up of substances called amino acids. Proteins and amino acids are the components of life. Amino acids are the byproducts of the digestion or breakdown of proteins. Amino acids are used by the body to create proteins that aid in the digestion of meals.

Organic substances known as amino acids have both an amino and a carboxyl group. They can be differentiated by the functional group R that is attached. Six of the twenty amino acids that make up proteins have R-groups that are either bases or acids.

To learn more about amino acids click on the link below:

brainly.com/question/21327676

#SPJ4

6 0
1 year ago
Organisms convert chemical energy into other types of of energy in order perform certain functions match each function to the ty
Dima020 [189]

eel- electrical energy

bat- mechanical energy

polar bear- thermal energy

firefly- radiant energy

4 0
3 years ago
The root word cyto means _____. heart cell bladder disease
Mice21 [21]
The root word cyto means "cell".
3 0
3 years ago
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