Which of the following is themes accurate description of how flatworms and people remove waste from their body?
a. Flatworms store waste in their bodies until they die. People remove waste from their lungs and kidneys.
b. Flatworms do not need to remove carbon dioxide from their body, and do not have a system to remove solid or liquid waste. Humans continually remove carbon dioxide and liquid waste from their body.
c. Flatworms release carbon dioxide directly from the skin, and use a simple digestive system to remove liquid waste. People use lungs to remove carbon dioxide, and have developed complex excretory and digestive systems to remove waste.

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.

Which codon is the code for the amino acid histidine (his)?

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods