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Helen [10]
4 years ago
11

Adrian caught a virus while staying with his grandmother. A few years later, his mother and sister got the same virus. This viru

s could spread through touch and direct contact. However, Adrian did not contract the virus this time, even though he was living with his mother and sister. Why did he not get sick? Adrian’s adaptive immunity remembered the antigens from the virus and gave him lifelong immunity to it. Adrian’s innate
Biology
1 answer:
soldier1979 [14.2K]4 years ago
8 0

Answer:

Adrian's adaptive immune system remembered the antigens from the virus. so he becomes immune to it.

Explanation:

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Answer:

In 1609, using this early version of the telescope, Galileo became the first person to record observations of the sky made with the help of a telescope. He soon made his first astronomical discovery.

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3 years ago
What components of the eukaryotic cell were visible in the onion root tip? Which components were not? Why do you think some comp
ruslelena [56]

Looking at the onion root tip under the microscope you can see large, rectangular cells with visible distinct cell walls surrounding it (cells have a more regular shape because of the wall). Inside the cells, you can notice darkly stained nucleus, large vacuoles at the center and sometimes small granules within the cytoplasm. Looking the onion root tip under the microscope is often the way to observe mitosis. Usually, you cannot see organelles such as mitochondria, ribosomes, rough and smooth endoplasmic reticulum, centrioles and Golgi body as they appear translucent and because are too small to be seen under the light microscope (electron microscope required). Also, chloroplasts are not present in an onion cell because it is not a photosynthetic cell.

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3 years ago
How does each of the following fungi fit the characteristics of the kingdom? Yeast, mold, mildew and mushrooms.
sineoko [7]
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mildew is </span>a thin whitish coating consisting of minute fungal hyphae, growing on plants or damp organic material such as paper or leather.
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i hope this helps u.
5 0
3 years ago
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lora16 [44]
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