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skelet666 [1.2K]
3 years ago
8

Rheumatoid arthritis is caused by: A. a bacteria B. a virus C. a reaction to an immunization D. an autoimmune reaction

Biology
1 answer:
Readme [11.4K]3 years ago
4 0
<em>it is the inflammation of joints mostly present in hands , feet and arms ..
the cause of this disease is 
<u>D . autoimmune reaction ..</u>
</em>
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Living things are composed only of organic elements, whereas nonliving things are made up of inorganic elementsa. Trueb. False
Scilla [17]

Answer: option B) Statement is false

Explanation:

Living things are NOT composed only of organic elements. Organic elements refers to compounds of Carbon, whereas living things such as Vertebrates (man, shark, lion etc) possess bones, teeth with INORGANIC components like phosphorus, magnesium, calcium.

Also, nonliving things are NOT made up of only inorganic elements. A good example is the air we breathe, it is non-living, yet contains carbon in the form of Carbiondioxide.

7 0
3 years ago
Many of the biochemical reactions that occur within cells are catalyzed by enzymes. Which of the following statements is true ab
Sever21 [200]

MOST ENZYME ASSISTED REACTIONS ARE REVERSIBLE.

this is because :

1. most enzyme assisted reactions are fast , not slow.

2. most enzyme reactions cannot take place at any temperatures as enzymes get denatured at high temperatures and so are will become unable to work.

3. ribosomes are organelle in cytoplasm which form proteins for cells.....as enzymes are proteins we can say they also manufacture enzymes.......but it is not necessary that enzyme assisted reactions can only take place within a ribosome.

4. but it is known that MOST enzyme assisted reactions ARE reversible.

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6 0
3 years ago
Cross a Heterozygous Type A with a Heterozygous Type B? What genetic terms best describes the genotypes of the offspring?
ahrayia [7]
Draw a box. On the vertical side of the box write A and O

On the horizontal side write B and O

Take each letter and combine it with the two letters in the other plane and write them in the box.

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Knowing that the A and B genes are dominant … you get the following children probabilities:

AO OA are A’s

OB BO are B’s

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THE TWO PARENTS CAN PRODUCE all the blood types of the ABO SYSTEM.
6 0
3 years ago
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Answer:

I believe number 10 would be B and number 11 would be D.

Explanation:

Energy travels from the sun to the producer which is like a plant of some sort. Then, the energy from the plant goes to the primary consumer which is the first set of consumers, in this example, it will be the minnow. Other consumers include secondary consumers, in this case the frog, quaternary consumers, like a snake that would eat the frog, and tertiary consumers, like an eagle that would eat the snake. Energy is passed to each organism from the organism before it in the food chain.

4 0
3 years ago
the theory that says that living things change over time in response to changes in their environment.
lord [1]

Answer:

Evolution explains how living things are changing today and how modern living things have descended from ancient life forms that no longer exist on Earth. As living things evolve, they generally become better suited for their environment. This is because they evolve adaptations.Feb 23, 2012Explanation:

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