BIOLOGY HIGH SCHOOL

A gene that makes it possible to distinguish bacteria that carry a plasmid (and the foreign DNA) from those that don’t is called a(an)a. resistance gene.
c. genetic marker.
b. antibiotic.
d. clone.

Answers

Answer 1
Answer: It is genetic marker

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Answers

Ich weis es nicht, leider kann ich dir hier nicht helfen

Which of the following cycles is crucial to living organisms? a. phosphorus b. water c. carbon d. all of the above

Answers

Answer: All of the above

Explanation:

The living component of the ecosystem consists of both living and non living components. The living components of the ecosystem consists of plants and animals.

The non-living components of ecosystem consists rocks, river, soil et cetera. The living components of the ecosystem needs to depend on the non living and living components.

The phosphorous, nitrogen and carbon cycle are important for the living components of the ecosystem.  
The answer is D. All of the above

in humans, the allele for hemophilia, h, is recessive. which is true of a woman with the genotype xhxh? a. the woman and all of her children are hemophiliacs. b. all of her sons will inherit the allele for hemophilia. c. she is a carrier of hemophilia but does not have the condition.

Answers

The answer is b. all of her sons will inherit the allele for hemophilia.

Hemophilia is X-linked recessive disorder. It is known that there are two X chromosomes (one from a mother and one from a father) in females and one X chromosome (from the mother) and one Y chromosomes (from the father) in males. In females, X-linked recessive disorder has the same pattern of inheritance as an autosomal recessive disorder.
So, if xh is recessive and xH is dominant allele, a mother which has xhxh genotype has the condition (so, c is not the right answer). Further, if a father has no condition, thus his genotype is xHy, their daughters will be carriers but without the condition (so, the choice a could be right only if we know that the father has hemophilia too (xhy). Therefore, since the mother (xhxh) will give her x chromosome to her sons, they will all inherit the allele for hemophilia, and choice b. is the right answer.

She is a carrier of hemophilia but does not have the condition

(I got it correct on Gradpoint)

Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. He notices that the vessel contains blood and has valves. What is the blood vessel that he is observing?a. capillary
b. vein
c. lymph
d. artery

Answers

The right answer is vein (it contains blood and has valves).

The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.

Answer: b. vein

Vein is a blood vessel that exhibit thin muscular walls and it brings the deoxygenated blood  from all the cells, tissues and organs back to the heart. In the veins the valves are present which prevent the backward flow of blood. Lumen of the vein is wide.

According to the above information vein is the correct option.

If a doctor wanted to be sure that a patient's urinary system is working properly, what would be the BEST indicators to investigate?

Answers

The best indicators would be if the doctor checked urine and stool samples, as well as the bladder and kidneys, and a blood test. Urine and stool first though.

What are some examples of atmosphere?

Answers

There are many different types of atmospheres, but some of the most common include the atmosphere of Earth, Mars, Venus, Jupiter, and Saturn.

The atmosphere of Earth is the layer of gases that surrounds the planet. It is made up of mostly nitrogen and oxygen, with smaller amounts of other gases like carbon dioxide, water vapor, and argon. The atmosphere protects us from harmful radiation from the sun and helps to regulate the Earth's temperature.

The atmosphere of Mars is much thinner than the atmosphere of Earth. It is made up mostly of carbon dioxide, with small amounts of other gases like nitrogen and oxygen. The atmosphere of Mars is not thick enough to protect the planet from harmful radiation from the sun, and it is not warm enough to support liquid water on the surface.

The atmosphere of Venus is the thickest atmosphere in the solar system. It is made up mostly of carbon dioxide, with small amounts of other gases like nitrogen and oxygen. The atmosphere of Venus is so thick that it traps heat from the sun, making the surface of Venus the hottest in the solar system.

The atmosphere of Jupiter is the largest atmosphere in the solar system. It is made up mostly of hydrogen and helium, with small amounts of other gases like methane and ammonia. The atmosphere of Jupiter is so large that it extends for thousands of miles above the surface of the planet.

The atmosphere of Saturn is similar to the atmosphere of Jupiter, but it is not as large. It is made up mostly of hydrogen and helium, with small amounts of other gases like methane and ammonia. The atmosphere of Saturn is also very cloudy, making it difficult to see the surface of the planet.

To know more about the atmosphere:

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Answer: An example of atmosphere is the ozone and other layers which make up the Earth's sky as we see it. An example of atmosphere is the air and gases contained inside a greenhouse.

Explanation:
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