Which of the following best describes the role that herbivores play in an ecosystem? a. herbivores break down nutrients contained in dead organisms and release these nutrients back into the ecosystem so that producers can use them to create energy. b. herbivores produce their own energy by obtaining solar energy from the sun and make this energy accessible to consumers by incorporating it into their own living tissue. c. herbivores consume carnivores and omnivores to obtain energy and make this energy accessible to producers by incorporating it into their own living tissue. d. herbivores consume living plant tissue to obtain energy and make this energy accessible to higher consumers by incorporating it into their own living tissue.

1. the passing of is the basis of heredity. 2. our encode the instructions that define our traits. 3. each of us has thousands of genes, which are made of and reside in our chromosomes. 4. in addition to our genes, the we live in also define our traits. 5. humans have two complete sets of chromosomes. 6. when parents conceive a child, each parent contributes set of chromosomes. 7. every child receives of its chromosomes from the mother and half from the father. 8. this transfer takes place at when the father’s sperm joins the mother’s egg. 9. while most cells in our bodies have two sets of chromosomes, or a total of egg and sperm each have chromosomes. 10. when egg and sperm unite they create a single cell called a 11. each parent contributes complete set of chromosomes to their child. 12. since the parents contribute the chromosomes to each new child, every child inherits a unique set of chromosomes. 13. as a result, every baby will have a combination of traits.

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?