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guapka [62]
3 years ago
14

Scientific consensus supports the idea that living organisms require oxygen. Then, a scientist discovers a type of bacteria that

metabolizes sulfur instead of oxygen, and thus survives in environments without oxygen. The scientist concludes that a diverse group of many different organisms could live in an oxygen-free environment. Why should are some scientists skeptical of the scientist’s results and conclusion?
Biology
2 answers:
son4ous [18]3 years ago
7 0
It survives by under water volcanoes like the marianas trench. :)
shtirl [24]3 years ago
3 0

Answer: D. The conclusion needs to be supported by more evidence.

Explanation: I did the quiz

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One difference between human cheek cells and onion cells is: 1. the presence of cytoplasm 2. the absence of a nucleus in the pla
AysviL [449]

Answer:

3. the absence of a cell wall in human cells

Explanation:

Animal cells do not have cell walls. Cell membranes separate the cytoplasm of the animal cells from the surroundings and maintain their interior. Plant cells have cellulosic cell walls. A cell wall surrounds the cell membrane of a plant cell. Cell walls serve to provide structural support and protect plant cells from pathogens. Cell walls also help keep excess water out of cells so they do not burst. Therefore, human cheek cells would not have cell walls while the onion cells would have cell walls made up of cellulose.

6 0
3 years ago
Which describes the 23 pairs of human chromosomes?
Zigmanuir [339]

Answer:

option B

Explanation:

there are 22 pair of autosome and 2 pair of sex chromosome

3 0
3 years ago
glucose levels go up in the bloodstream after a meal. beta cells of the pancreas detect the elevated glucose levels. this causes
Keith_Richards [23]

The secretion of insulin into the bloodstream is done through exocytosis and absorption through the capillary arteries.

Insulin is a protein required to process sugar. This is a <u>naturally produced protein</u> for which the pancreas is responsible. The insulin Protein is considered a transport protein. It is responsible for carrying glucose from the bloodstream into cells to be used as energy.

This protein is of vital importance. The secretion of this protein is done through exocytosis, which means that after passing through the ribosomes and the Golgi, it is contained within a membrane, which will then fuse into the plasmatic membrane and be released from the cell. It is then absorbed through the capillaries to enter the bloodstream.

To learn more:

brainly.com/question/6658031?referrer=searchResults

4 0
2 years ago
How can you protect yourself from biological hazards associated with human sources?
jarptica [38.1K]

Answer:Ways of protecting one's self from human sources of biological hazards include: Effective use of personal protective equipment such as hand gloves, nose masks, face cover, shoe cover.

Explanation:Human sources of biological hazards may include waste products from human such as faeces, urine and also fluids such as blood from bleeding wound, saliva and so on. These substances may harbor bacterial and viral infections which may result in biological hazards. Therefore, good personal hygiene and use of personal protective equipment will protect one from biological hazards related to human sources.

3 0
3 years ago
Read 2 more answers
Please help me, I need this ASAP!
AveGali [126]
Prophase I
The chromosomes condense, and the nuclear envelope breaks down & crossing-over occurs.

Metaphase I
Pairs of homologous chromosomes move to the equator of the cell.

Anaphase I
Homologous chrmosomes move to the oppisite poles of the cell.


Telophase I and Cytokinesis
Chromosomes gather at the poles of the cells & the cytoplasm divides.

Prophase II
A new spidle forms around the chromosomes.

Metaphase II
Chromosomes line up at the equator.

Anaphase II
Centromeres divides & chromatids move to the opposite poles of the cells.

Telophase II and Cytokinesis
A nuclear envelope forms around each set of chromosomes & the cytoplasm divides.
8 0
3 years ago
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