Four examples of the effects of environmental change are given. Match each one with the type of environmental change it demonstrates.
human exploitation
climate change
natural disasters
disease
African forest elephants have been hunted to
near extinction levels to obtain ivory.
Increasing global temperatures have altered
migration patterns of humpback whales.
The eruption of Mount Saint Helens destroyed
some populations of conifers.
An infection with a fungus reduced
the population of North American elm trees.

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.

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated