Chargaff's rules of DNA structure states that

A + T = G + C.

A + G = T + C.

A = C, T = G.

A = T, G = C.

the number of purines in DNA never equals the number of pyrimidines.

A community can eventually develop from bare rock into a stable mature community where there is little change in the composition of species. this maure community is called

The finches of the Galápagos Islands changed over time as insects became more plentiful.

The biosphere is best described as the regions of Earth that support a. plant life b. animal life c. all life d. human life

Which of the following pairs is not correctly matched? a. sarcolemma - muscle fiber plasma membrane b. transverse tubule - generate ATP c. mitochondria - produce ATP for muscle contractions d. sarcomere - functional unit of the myofibril

What is meant by predation? what is the relationship between predator and prey

Photoperiodism and flowering use the data in the table below to determine whether each plant is a short-day plant, a long-day plant, a day-neutral plant, or a plant that cannot be classified based on the data. description plant a plant b

The alkali metals make up which group of the periodic table?

What is the most important mechanism through which combined oral contraceptives prevent pregnancy?

You are making CO2 production measurements on hovering hummingbirds in Peru and assume they have fed on floral nectar recently (glucose), but in fact, they have not fed in the last hour and are metabolizing fat;

C. Which specific biomolecule (lipid, protein, nucleic acid, carbohydrate) is each food mostly made of?