The tundra ecosystem of alaska is known as a “cold desert.” it receives very little precipitation, about four inches annually. however, it is rich in wetlands due to permafrost, which traps moisture close to the surface. the temperatures vary widely, also producing persistent winds. although treeless, the arctic tundra is an abundant ecosystem. many organisms find their niche here including many migratory bird species and mammals such as caribou, foxes, bears, and small rodents. which element of the tundra ecosystem is biotic? wind dead bird carbon dioxide temperature

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.

Does masterbation affect height growth or loss of growth hormone?

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above