The primary infection stage of HIV is characterized by

1. night sweats.

2. cirrhosis.

3. genital warts.

4. recurrent opportunistic infections.

Scientists can now distinguish trypanosomes recognized by antibody a from trypanosomes recognized by antibody b, and they can measure the abundance of each type of trypanosome.

Difference between the geosphere and cryosphere

Infer whether species diversity increases or decreases after a fire on a grassland

How does a lytic virus kill the cells that it infects?

A mutation occurs in a brain cell. This mutation will be passed on to A. neighboring brain cells. B. other body cells. C. cells produced when the mutant cell divides. D. offspring.

Egg laying land animals have evolved to produce eggs with tough shells to ensure that

Which of the following statements describes a proton of an atom? A has a negative charge and is located in the nucleus. B has no charge and is located in the nucleus C has a positive charge and is located in outer energy levels.

What are reasons scientists use models? To study objects far away To study objects too large To study objects too small. To study objects easily found in a lab. To study events that take place over long periods of time.

1. true false Carbon atoms form the building blocks of most living things.

Inhibiting enzymes involved in cell wall synthesis leads to which of the following? A) cell death by osmotic lysisB) a reduction in protein synthesisC) the incomplete synthesis of the bacterial cell wallD) a reduction in the amount of usable energy