Animals such as hydras and jellies can exchange gases directly with the environment by ________
A) diffusion
B) active transport
C) osmosis
D) bulk transport
A
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Which one of the following statements about eugenics is UNTRUE?
A. It was founded by Charles Darwin. B. It is a dubious method for improving the human species through selective breeding. C. It is based on the assumption that human traits are much less influenced by environment than genes. D. It contributed to the Immigration Act of 1924. E. It was used to justify the passage of sterilization laws.
Gases move freely across the walls of the bronchioles into the capillaries that surround them
____________________ Indicate whether the statement is true or false.
What’s the role of oxygen in cellular respiration?
What will be an ideal response?
Which of the following pairs of molecules share the same chemical composition but differ in molecular structure?
A. starch and glycogen B. glucose and fructose C. DNA and RNA D. lactose and sucrose