Within a DNA molecule, which nitrogen base pairs with cytosine (C) ?

A. uracil (U)

B. thymine (T)

C. adenine (A)

D. guanine (G)

How did the evolution of pollen benefit land plants?

Which of these statements regarding the aging process is false?

Which of these describes a quantitative observation? A) an observation of the phenomenon itself B) an observation of the relative size of something OC) an observation of an effect the phenomenon has D) an observation that has a number associated

Why is the human brain not considered to be a living organism

It is the part of a flower where the pollen grains are located. A. Anther B. Filament C. Stigma

When the reuptake of dopamine is blocked by the ritalin or cocaine molecule, what would happen?

Genetic material is being duplicated during which phase of the cell cycle? A. D phase B. M phase C. interphase D. G0 phase

Choose the correct process for the description given: does not require light

Samuel visited an ecosystem. he found that the weather is very hot and dry, the entire land is surrounded by sand, and the plants that have thorns with fleshy leaves. which ecosystem did samuel visit? a. tropical rainforest biome b. desert biome c.

Visit the website below and use the information to answer the following question. Ecological Succession: Transformation of Communities over Time Why does secondary succession occur faster than primary succession?