The competitive exclusion principle states that _____
A) it is not possible for two species with the same niche to coexist in the same region
B) it is not possible for two species to compete for the same resources
C) two species with different niches will not compete for the same resources
D) two species with the same niche will constantly be competing for resources
Answer: A
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If your mass is 70 kg on Earth, how much is your mass on the Moon?
(a) less than 70 kg. (b) more than 70 kg. (c) 70 kg. (d) none of the above.
Matching. Choose the one most appropriate answer
for each. 1. ___ nephron 2. ___ aldosterone 3. ___ tubular secretion 4. ___ ADH 5. ___ conduction 6. ___ convection 7. ___ pilomotor response 8. ___ ectothermic 9. ___ evaporation 10. ___ glomerular filtration 11. ___ hemodialysis 12. ___ hypothermia 13. ___ heterothermic 14. ___ radiation 15. ___ tubular reabsorption A. do not maintain the same body temperature at all times; are capable of internal heat production B. heat energy is released to the air when liquid water converts to gaseous form C. bulk flow of protein-free plasma from capillaries into Bowman’s capsule D. animals with more or less constant body temperature E. emission of heat from body surface when environmental temperature is lower than the body temperature F. movement of ions from peritubular capillaries into nephron tubules G. loss of too much body heat H. heat next to the body’s surface undergoes mass transport by air or water currents I. active and passive transport of solutes from peritubular capillaries into the glomerular capillaries J. a long, slender, tubular unit in the vertebrate kidney that forms urine K. body temperatures rise and fall with environmental changes L. secreted by adrenal glands; influences sodium reabsorption M. passive transport of water; active and passive transport of solutes out of the nephron into peritubular capillaries N. heat energy is transferred from high to low temperature regions due to collisions between adjacent molecules O. released from the posterior lobe of the pituitary in response to hypothalamic signals P. toxic substances are extracted from blood circulating in cellophane tubes suspended in a warm-water bath Q. erection of hairs and feathers by smooth muscles in the skin
Sexual behavior and emotional expression are partially controlled by the
a. pineal gland. b. medulla. c. hypothalamus. d. thalamus. e. cerebrum.
On food packages, "insoluble fiber" refers to plant material that we cannot fully digest, but is important for maintaining a healthy digestive tract. This substance refers to a(n):
A) carbohydrate. B) nucleic acid. C) protein. D) lipid. E) amino acid.