Infection by the human immunodeficiency virus (HIV) into a target cell is shown here. Which statements are supported by the model of HIV infection? Select ALL that apply.

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.