Ammonia has a pH of 11.5 - what does this mean?

During the process of protein synthesis, each tRNA carries one

Term that describes an organism that makes it's own food

Purple spots is a homozygous recessive genetic trait in martians (assume their hereditary patterns match that of eukaryotes on earth).

Explain the differences in the types of clouds. Citrus, Cumulus, Stratus and Cumulonimbus.

How does the basic structure of a steroid differ from other macromolecules such as carbohydrates?

Dna stands for what in biology

Coal is used to produce energy. The harmful gases produced by coal are cleaned up by a method which needs a large amount of limestone. Predict and explain the long term effect on the environment of obtaining and using limestone.

True or false two genes may not segregate independently if they are on the same chromosmoe

Blood pressure rises and falls in a pattern corresponding to the phases of the

Immune system cells enter a resting phase after undergoing mitosis. when activated-for example, by an infection-they can reenter the sequence of events in the cell cycle that leads to cell division.