Biology » Page 53

Biology

Clark Richard

Does a window air conditioner pull air from outside

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Biology

Autumn Benjamin

Which of these properties of a star best determines its life cycle?

density

temperature

brightness

mass

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Biology

Hatfield

How many codons are needed for one amino acid?

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Biology

Alvaro Woodward

1) which structure regulates breathing rate in humans?

A) diaphragm

B) lungs

C) hypothalamus

D) medulla

2) the first forms of life on earth

A) appeared about 10,000 years ago

B) could easily maintain a stable internal environment

C) were single-celled

D) depended on the hypothalamus for thermo regulation.

In an embryo, the tissues that receive a nerve produce sprouting factor, which encourages nerves to grow and branch, while the nerve produces anti sprouting factor, which inhibits grow.

a. Positive feedback

b. Negative feedback

c. Thermoreglation

d. homeostasis

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Biology

Tiana Kent

What is a chemical transmitter?

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Biology

Robert Holder

How do groups of organs assemble and work together to make an organism?

A. they form other organs

B. they form group of cells

C. They form organ systems

D. They form an ecosystem

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Biology

Agustin Sweeney

What substance is analogous to a factory manager?

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Biology

Jase Dougherty

What can you conclude about fossil by looking at the layers of rock?

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Biology

Jax Warner

Compare "lack of contact inhibition" in cancer cell and innormal

cell.

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Biology

Georgia Mccormick

Bruce Ames constructed a mutagenicity test which initially missed carcinogens which were noncarcinogenic to the tester strains. Why?

a. tester strains were more resistant to the mutagenic effects of the carcinogen than eukaryotes

b. not all carcinogens are mutagens

c. potential carcinogens needed to be modified in eukaryotes before they were mutagenic

d. histidine biosynthesis was inhibited by the presence of the carcinogens

e. the organism used in the test is a pathogen of mice

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Biology

Guest

The Hardy-Weinberg Principle is that genetic frequencies in a population? Will remain stable from generation to generation Will always be changing Will not be affected by environmental changes Are always in a 3:1 ratio.

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Biology

Melina Hayes

Described the overall process of the cardiovascular system of the amphibian

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Biology

Hugh Meza

High-throughput sequencing reveals that 30 new mutations have occurred in the coding regions of genes in an individual lizard. If the coding regions of this lizard comprise 150 million nucleotides per haploid genome, what is the mutation rate per nucleotide?

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Biology

Marco Beasley

How is messenger RNA formed?

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Biology

Guest

Which scientific investigation has A question procedure and conclusion

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