Why is carbon important

Jennifer agrees that a sample of her DNA may be used in a scientific study. The scientists will analyze the sample and compare it with information in data bases.

How can sound waves be used for various applications

How does the human circulatory system, digestive system, and respiratory system work together to keep cells alive? Answer in complete sentences using proper spelling and grammar.

Why that defense technique works against some viruses or bacteria

Which of the following brought about an increase in human populations by increasing the amount of food and medicine available and decreasing the death rate: a. industrial revolution b. world war ii c. the internet d. invention of the car

Which nonmetals, besides hydrogen, are most often involved in hydrogen bonding?

The children in a family all have blue eyes. the biological parents also have blue eyes. the science that explains these similarities is called genomes. a. True b. False

An increase in the level of hormone A causes an increase in the level of hormone B. The increase in the level of hormone B then causes a decrease in the level of hormone A.

What did the shift from hunting and gathering to gardening lead to?

In the human body, oxygen is absorbed by the lungs and nutrients are absorbed by the small intestine. In a single-celled organism, this absorption directly involves the 1. nucleus 2. chloroplasts 3. cell membrane 4. chromosomes