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Kamila [148]
3 years ago
12

Why do many Africans not have indoor plumbing?

Biology
1 answer:
Cloud [144]3 years ago
5 0

Answer:

This statistic shows the share of urban households with indoor plumbing in selected African countries in 2017. In South Africa, 60 percent of urban households had indoor plumbing at home, whereas the same was true for eight percent of urban households in Uganda.

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How many chromosomes are there in human ovum​
denis-greek [22]

Answer:

23 chromosomes

Unlike all the other cells in a human body which are diploid, human sex cells are haploid. That means that both sperm cells and ova are haploid; containing only 23 chromosomes.

Explanation:

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7 0
3 years ago
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An instrument used for the visual examination of the ear is called a(n):
Alina [70]
The correct answer is tympanometer. A tympanometer is not used to measure hearing, but to rather measure the transmission of energy through the middle ear. In this way, tympanometry is an objective test of the function of the middle-ear. Tympanometry is used alongside other measures to asses hearing, such as pure tone audiometry.


7 0
3 years ago
What state best describes natural selection
baherus [9]

Answer:

Louisianna

Explanation:

8 0
3 years ago
Which of these statements about trophoblast is false?
lukranit [14]

Answer:

The statement C that says ''is derived from the inner cell mass'' is false.

Explanation:

The trophoblast is a structure composed of a set of cells (cytotrophoblast and syncytiotrophoblast), which are shaping the outer layer surrounding a blastocyst, during the earliest stages of embryonic development that mammals pass.

The trophoblast provides nutritive molecules to the developing embryo and facilitates its implantation to the uterine wall due to its ability to erode the tissues of the uterus, that is, it is responsible for making it possible for the embryo to be implanted in the uterine endometrium. Thus, the blast can join the cavity formed by the uterine wall, where it will absorb nutrients from the fluid from the mother.

During the third week, embryonic development includes the development of the trophoblast. At the beginning, the primary villi are formed by the internal cytotrophoblast which is surrounded by the outer layer of syncytiotrophoblast. Then, the cells found in the embryonic mesoderm are directed to the primary villous in the third week of gestation and when it ends, the mesodermal cells begin to be singled out to form blood vessel cells.

7 0
2 years ago
10. Deep open currents....
sasho [114]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Deep open currents <span>make up 10% of the ocean and are greater than 400 m deep</span>
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3 years ago
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