Which phrase best describes the time period in which the current body of scientific knowledge was developed?

A. Just over the last 50 years

B. Throughout all of history

C. Mostly during Roman times

D. Mostly in the 20th century

What's the most common type of mutation observed in living populations

If an organism's diploid number is 12, what would be its haploid number? 3 6 24 48

The tundra is cold year-round. it has short cool summers and long, severe winters. The tundra has a permanently frozen sublayer of soil called permafrost.

If we removed the decomposers from this food web, how would it affect the balance of the ecosystem? A.) There would be an increase in dead matter and a lack of nutrients in the soil. B.

A patient who suffered a stroke says that she no longer recognizes herself in a mirror. which brain structure was likely damaged in the stroke?

Which statement is false concerning lactic acid? a. It is formed during fast glycolysis b. It is formed when hydrogens combine temporarily with pyruvate c. It can diffuse into the blood and be carried away from the site of production d.

Imagine that you are observing an enzyme-catalyzed reaction in the lab. Every time you add more enzyme, the reaction rate increases proportionally until the reaction rate suddenly levels off.

Which human activity has had the greatest impact on climate change? A. deforestation B. burning fossil fuels C. production of nuclear waste D. building skyscrapers

Check answers. 1. The active site A. Located in an enzyme (my answer) B. Is rich in amino acid C. Is located on a substrate D. A and B E. B and C 2. Anabolism is defined as the A. Sum of all chemical reactions B.

How are genetic characteristics associated with nonreproductive activities such as feeding affected by natural selection?