BIOLOGY MIDDLE SCHOOL

What is the primary cause of cancer

Answers

Answer 1
Answer:

Answer:  A carcinogen

Explanation: Cancer is caused by accumulated damage to genes. ... The substances that cause cancer are called carcinogens. A carcinogen may be a chemical substance, such as certain molecules in tobacco smoke. The cause of cancer may be environmental agents, viral or genetic factors.
Answer 2
Answer:

Answer:

carcineon

Explanation:

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Please define cell wall ?
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Elevation and precipitation are important to the process of hydroerelectric power. true or false

Answers

Hydropower is energy is moving water. Precipitation is based on evaporation, so True.

Which best characterizes the Precambrian era?A.


abundant plants and animals


B.


dinosaurs


C.


small, one-celled organisms and primitive jellyfish


D.


extensive mountain building

Answers

the answer is dinosaurs

Answer:

It is C

Explanation:

Because everything's starts out small and they are the smallest in the eras because one cell turns to two cells and etc. it was the beginning of all life forms . It couldn't be dinosaurs because they were in the Mesozoic era. At the time of the Precambrian  era i think it was before the Phanerozoic eon

What do frogs do on land and in water?

Answers

Well, frogs are mostly born in water (tadpoles) and when they are old enough, they can be on land!

Humans are superior to all other animals in ?

Answers

I believe this would be the food chain, but could also very well be how advanced the human brain is. Hope this helped!

its the Food chain. Yummy Yummy lol

Help me pls (no links or get banned)

Answers

Answer:

Explanation:

For number 1a it is water, for 1b it is the plant height

2a is acid rain and 2b is the fish population

1a water 1b plant height

2a acid rain 2b fish population

Which macromolecule is made of monomers called nucleotides

Answers

dna and rna.

DNA has the deoxyribose sugar and RNA has ribose sugar and nucleotides are same in both.

nucleic acid

hope this helps

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Look at the scientific names for the two organisms below: Felis domesticusFelis bengalensis What can you tell about these two organisms from their scientific names?A. You cannot tell anything about an organism from its scientific name alone.B. The organisms are different subgroups of the same species.C. The organisms are different species, but belong to the same genus.D. The organisms belong to the same kingdom but different phyla.
Can u help with tee rock part and plz asap I really need help
List three objects that interact with magnetic fields