BIOLOGY MIDDLE SCHOOL

Which cells in our bodies do not divide in our bodies?

Answers

Answer 1
Answer:

Answer:

the answer is nerve cells


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MIDDLE SCHOOL

What kind of condition is tachycardia​

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Tachycardia is an abnormally rapid heart rate.
HIGH SCHOOL

suppose you were to grind the up and homogenate a pancreas. Do you think it would be possible to isolate insulin from this homogenate?

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No.

It should be taken into consideration that pancreas  secretes not only hormones, such as insulin, but also digestive enzymes, such as trypsin, chymotrypsin, and other polypeptidases. Grinding up the pancreas results in releasing of both insulin and digestive enzymes. But, digestive enzymes are able to break down insulin into fragment not anymore considered as a hormone. So, it is not possible to isolate insulin from this homogenate
HIGH SCHOOL

Bacteria adapt more quickly than elephants to environmental changes. which best explains this difference?

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The best explanation is that bacteria reproduce more rapidly. 
Bacteria adapt to other environmental conditions, such as adaptations to changes in temperature, pH, concentrations of ions such as sodium, and the nature of the surrounding support. Bacteria have been designed to be adaptable . Their surrounding layers and the genetic information for these and other structures associated with a bacterium are capable of alteration.
MIDDLE SCHOOL

What peculiar feature did Darwin find in the tortoises on the Galapagos Islands? A.They were domesticated.
B.They had adapted to their surroundings.
C.They had access to better food sources.
D. They were a better breed than regular tortoises.

Answers

Tortoise evolved in Galapagos to adapt in their surroundings. Therefore option (B) is correct.

What is Darwin's theory of evolution?

Darwin studied local wildlife. He was attracted by island species that looked like mainland ones but had significant morphological differences.

Galapagos tortoises have two distinct forms to suit feeding habits on low, desert islands and high, lush islands. Lonesome George is a saddle-shelled turtle. This adaption helps them eat tree cacti and arbitrate food disputes by elevating their heads.

On islands with lots of low-growing foliage, dome-shelled tortoises don't have to elevate their heads to eat.

Learn more about Darwin's theory, here:

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B. They had adapted to their surroundings. 

Adaption observed by Darwin on the Galapagos Islands also lead to the idea of Natural Selection: that those better suited to survive in their environment will continue to live and reproduce, passing on the traits to help the descendants survive as well.
HIGH SCHOOL

What is the difference between Genes and Alleles?

Answers

Genes is found in the DNA. It decides a specific characteristic. Genes can transform and take two or more option structures and these structures are called Alleles. Presently allele happens in an altered spot in a chromosome and in people we have two arrangements of chromosomes.

There are 46 chromosomes in the human. 23 from the dad, 23 from the mother = 46 chromosomes.

 Gene- Section of DNA which encodes a protein. One, or more often, many genes are involved in determining physical characters( phenotype). 

Allele- version of a gene. 
MIDDLE SCHOOL

Which statement correctly describes some functions of a cell? A. The mitochondrion and the nucleus help to make food for the cell.
B. The cytoplasm and the chloroplasts control the activities of the cell.
C. The cell membrane and the chloroplasts support the structures of the cell.
D. The cytoplasm and the cell membrane allow materials to move through the cell

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Answer: I believe it is D

Explanation:

HIGH SCHOOL

Bears will eat just about anything: berries, fungi, salmon, insects, and much more. Bears are

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Bears are omnivores. If thats what you are looking for.

Answer:

omnivores

Explanation:

HIGH SCHOOL

which of the following statements about natural selection is true? a. natural selection causes variations to arise within a population. b. natural selection leads to increased likelihood of survival for certain individuals based on variation. the variation must come from outside the population. c. natural selection results in those individuals within a population who are best-adapted surviving and producing more offspring. d. all individuals within a population have an ...

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It might be C, because the ones who survive to reproduce the most babies pass on their genes more.
HIGH SCHOOL

The ability of the body to perform prolonged, large-muscle, dynamic exercise at moderate to high levels of intensity is called:

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cardiorespiratory endurance
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