Which is the best conclusion the scientist can make based on the observation?

A. the nucleic acid is a protein

B. the nucleic acid is DNA

C. The nucleic acid is RNA

D. More tests would be needed to determine the type of nucleic acid in the sample

A pollen grain landing on a stigma of a flower of the same species produces a? a. gametophyte b. pollen tube c. flower d. stamen

How do humans impact on the water cycle

Upon centrifugation, particles sediment at different rates due to their physical properties. Tropomyosin is a rod-shaped protein with a mass of 70 kDa and a sedimentation coefficient of 2.6S.

Both species benefit in the type of symbiosis called parasitism. true or false

Which structure of a paramecium holds a reserve copy of all a cells genes?

Do genes determine specific traits in an organism

Simple single celled organisms often reproduce by the process of

What do plant roots that grow in cracks of rocks cause?

Diabetes occurs when there is a large amount of sugar in the blood. Which gland is most likely not functioning well enough in a person who has diabetes?

All life depends on the availability of usable energy. This energy is released when (1) organisms convert solar energy into the chemical energy found in food molecules (2) respiration occurs in the cells of producers and high-energy molecules enter