BIOLOGY HIGH SCHOOL

What does the theory of endosymbiosis help explain

Answers

Answer 1
Answer: The theory of endosymbiosis help explain the origins of eakaryotic  cell  organnels such as mitochondria in animals and fungi and chloroplats in plants was greatly advanced by the seminal work of biologist Lynn Margulis in the 1960's. 

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A change in the natural sequence of bases in DNA structure is called a
Amy goes jogging every morning. She has big strong muscles in her legs. Will Amy’s children inherit big strong leg muscles?1) No, because big strong muscles are caused by your lifestyle and cannot be inherited. 2) Possibly, because Amy’s children will inherit some of her features. 3) Yes, because Amy’s children will inherit her features. 4) Yes, because Amy’s children will inherit genetic information from her genome.
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Based on the endosymbiotic theory, what cell would result from the endosymbiosis of a cell with a cyanobacterium

Answers

The answer is B. The prokaryotic cell can make its own food.
B. Because, Bacteria is a prokaryote on its own.

Which sentence lists events in the cell cycle in correct order, from earlier to later?The chromosomes become longer and thinner; spindle fibers attach to the centromeres.
The nuclear membrane reforms; the chromosomes align in the middle of the cell.
The chromosomes replicate; the nuclear membrane dissolves.
The sister chromatids are separated; the chromosomes condense.
Which of the choices below describe one similarity between meiosis II and mitosis?
In both processes, sister chromatids are pulled apart.
Homologous chromosomes separate in both stages.

Answers

The chromosomes become longer and thinner; spindle fibers attach to the centromeres.

Cell cycle refers to the process by which the cells undergo several DNA duplication activities creating daughter cells. It is very important because without the cell cycle there would be no reproduction of the body cells and that would lead to  dysfunctional body organs.

Which organism in the Alpine biome was once nearly extinct and is now on the endangered species list?

Answers

The organism in the Alpine biome that was once nearly extinct and is now on the endangered species list is the Grizzly Bear. They are omnivorous and opportunistic when it comes to food. They are now n the endangered species list due to the shortage of food.

Chinchillas, got it from edge

Given the following DNA strand which of the following is it’s complementary MRNA? GGACTGATTA. C C U G A C U A A
B. C C T G A C T A A
C. G G A C T G A T T
D. T T A G T C A G G

Answers

The following DNA strand "GGACTGATT" has the complementary mRNA strand "CCUGACUAA". Thus, the correct option is A.

What is mRNA?

An mRNA is a type of RNA which is found inside cells. mRNA is also known as messenger RNA. The mRNA molecules carry genetic information which is required to make proteins in the cell. They carry the information from DNA in the nucleus of the cell to the cytoplasm where the proteins are synthesized.

The mRNA synthesized complementary to the sequence of DNA strand can be determined. As A base pairs with U and vice versa and C base pairs with G and vice versa. Thus, the sequence of mRNA synthesized from the DNA sequence "GGACTGATT" will be "CCUGACUAA".

Therefore, the correct option is A.

Learn more about mRNA here:

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It is A. C C U G A C U A A

What takes place when you inhale and exhale ?

Answers

When you inhale and exhale, you actually breathe. When you inhale, your intercostal muscles between ribs and diaphragm contract. This increases the space in chest cavity so your lungs can expand and the air enters the lungs. When you exhale, intercostal muscles and diaphragm relax reducing the space in the chest which leads to removing the air from the lungs.

Compare the food energy in calories from burning the chip and the saltine. How can you explain this differences in terms of chemical composition?

Answers

The answer  to this question is A

The chip contains more lipids than the saltine.
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