How are viruses used in gene therapy?

a. to attack the immune system

b. to carry new genes into cells

c. to infect disease-causing bacteria

d. to kill cancer cells that have "suic*de genes"

What is hematopoiesis and where in the body does it occur?

Which of the following is NOT one of the climate regions? a. Tropical Continentalc. Temperate Continental b. Tropical Rainyd. Highlands

1. The role of an organism in the ecosystem 1 Called to species niche mos habitat environment

1. After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases? a. A = T and C = G. b. A = C = G = T. c. A = C and G = T. d. A + T = C + G.

Select the correct partial path below. this path is part of the complete blood flow pathway. you should be able to trace flow starting in any location. select the correct partial path below. this path is part of the complete blood flow pathway.

Example and description of the gnetophyta

Does fusion take place in the suns core

What kinds of mutations can be inherited and which cannot?

Which features of the ocean floor are found in the open ocean? Check all that apply.

Glucose is a building block of starch. Which of the following best describes glucose? protein O nucleotide lipid carbohydrate