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3 years ago

Why do many diseases such as measles occur only once in a person yet others such as colds occur more than once?

Biology

1 answer:

mezya [45]3 years ago

3 0

Answer:

This happens because of our immune system. Our immune system keep record of every attacking microbe. It contains two type of while blood cells firstly is T cell that respond quickly to the attacking microbe. While secondly B cells that recognize those specific cells and fights them off. In addition to that B cells clones itself as memory cells for that disease and will remains in your body for years

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Pls find the full answer of this questions also draw bargraph

LUCKY_DIMON [66]

SEE IMAGE FOR BAR GRAPH

Explanation:

MULTIPLE CHOICE QUESTION..

1)FOOD

2)NON -GREEN PLANTS..

3)DECAYING WASTE

4)GROWTH OF FUNGUS

5)PARASITE

6 0

3 years ago

Please tell me how does water flow through sponges in order

polet [3.4K]

Answer:

Small and tube shaped, water enters the sponge through dermal pores and flows into the atrium. Choanocyte flagella create the current to expel it through a single osculum. Note that water enters the sponge through a modified cell known as a porocyte.

Explanation:

Hope this helped, Have a Wonderful Day!!

5 0

3 years ago

1. True or false: even when youn

Aloiza [94]

Answer:

brainllest if right

False

Explanation:

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3 years ago

Read 2 more answers

in your opinion, should there be a uniform set of regulations that labs should follow when they are developing genetically modif

Irina-Kira [14]

Answer:

yes if all students wear sa.e uniform the school i

will be morden

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3 years ago

Describe how the functional units for beta carotene, xanthophyll, chlorophyll a, and chlorophyll b are different. be sure to ide

leonid [27]

The pigments have a similar structure of 40 carbon atoms covalently bonded in a chain. Carotenoids contain oxygen atoms in their chemical structure (retinyl functional group) while xanthophyll does not. This makes carotenoids more non-polar compared to xanthophylls, hence move farthest in chromatography paper using a nonpolar mobile phase. Chlorophyll pigment, on the other hand, has chlorin rings (which are larger) as functional units hence move slowly in chromatography.

Photosynthetic rates can be measured by either the amount of oxygen they consume per particular time period or the amount of carbon dioxide produced per particular time period. This is conducted while immersed in water so as to measure bubble rate formation in case of oxygen production or the change in water pH in the case of carbon dioxide consumption.

When autumn approaches, the amount sunlight received by the plant is reduced due to longer night than days. Deciduous trees have adapted by losing chlorophyll a and b pigments (most important in photosynthesis) during this time. This leaves a higher amount of the other red and yellow pigments hence making the leaves change from green to yellow-red.

It is believed that this is the result of an ancient endosymbiotic relationship between a protist and a eukaryotic cell. The protist generates energy that the eukaryotic can utilize in its growth and reproduction while the protist is sheltered. This relationship became obligatory symbiosis over time.

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3 years ago