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stepladder [879]
3 years ago
6

Help! I'm grounded if I don't get a good grade on my test

Biology
1 answer:
katrin2010 [14]3 years ago
8 0

Answer:

A is the answer

Explanation:

Hope I helped

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Is hepatitis B the most common bloodborne pathogen?
IrinaK [193]

Answer:

No.

Explanation:

Hepatitis C is the most common bloodborne pathogen.

Hepatitis C as of 2022 has a infection rate of 3.7 million.

Hepatitis B as of 2022 has a infection rate of 2.2 million, or <em>1.5 million</em> lower than Hepatitis C.

Therefore, Hepatitis B is not the most common bloodborne pathogen.

Learn more about Hepatitis B, here:

brainly.com/question/6284143  - The three bloodborne pathogens healthcare workers in the US are most likely to be exposed to.

5 0
2 years ago
What is the name of the small flap of tissue that seals off the trachea during swallowing?
vekshin1
The answer is epiglottis.
8 0
3 years ago
It has been reported that the DNA of the elephant shark has barely changed over the last 420 million years. Which statement expl
dmitriy555 [2]
Their environment remained fairly constant over time
8 0
3 years ago
Read 2 more answers
A woman produces an egg with 24 chromosomes, including 2 copies of chromosome 21. If the egg is fertilized by a normal sperm, th
Zielflug [23.3K]

Answer:

47

Explanation:

We all know that gametes like egg cell and sperm have haploid set of chromosomes but here as per this question she has produced 2 copies of chromosome 21. For the sake of maintaining haploidy, she was supposed to have only a single copy of chromosome 21 as a result of which her egg cell was supposed to have 23 chromosomes not 24.

But, this is a case of non dis-junction. Also, in a normal sperm there are no such copies of any chromosome i.e. there is a haploid set of chromosomes. It means that sperm must be having only 23 chromosomes. So we can easily infer that when the egg cell and sperm will fuse, the zygote will have 47 chromosomes (24 from egg cell and 23 from sperm).  

6 0
3 years ago
What is the thread like structure that helps bacteria hold onto surfaces
Margaret [11]
Fimbriae is the word you're looking for
4 0
4 years ago
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