The fossil record reveals that the structure of shoulder joints in birds, which is essential for flight, is an adaptation that
originated in ____.
a. nonflying birds
b. ancient bats
c. ancestral birds
d. nonflying dinosaurs
e. flying dinosaurs
ANSWER: d
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Exchange of waste, nutrients, and oxygen occurs here. _____
A) Human chorionic gonadotropin
B) Zygote
C) Chorion
D) Morula
E) Folic acid
F) Fertilization
G) Blastocyst
H) Parturition
I) Cleavage
J) Ovulation
K) Placenta
L) Implantation
A friend asks you how exocrine glands differ from endocrine glands. She knows that both form from invaginated epithelium. How do you respond?
A. The liver is an endocrine gland that secretes directly into epithelial tissues. The pituitary gland is an exocrine gland that secretes into the blood stream. B. Exocrine glands produce hormones that enter the blood stream, while endocrine glands secrete sweat and oil directly to the surface of the skin. C. Exocrine and endocrine glands are essentially the same, both produce products that are secreted to the skin's surface. D. Exocrine glands are found in the thoracic cavity while endocrine glands are located in the pleural cavity. E. Endocrine glands produce hormones that enter the blood stream, while exocrine glands secrete sweat and oil directly to the surface of the skin.
Identify and briefly explain the four premises of evolution by natural selection, as proposed by Charles Darwin. What will be an ideal response?
What would be required for the last product of glycolysis, pyruvate, to enter the Krebs cycle?
A. more glucose for energy B. oxygen C. ATP D. carbon dioxide