PLZ HELP ITS EASY ITS DUE IN 5 MINUTES 1. Which statement is true about DNA?

a. DNA is an exact copy from parent to offspring.

b. DNA is not necessary for an organism to reproduce.

c. DNA contains genes that hold specific traits for an organism.

d. Organisms create their own DNA sequence that is not like their parents.

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins