How are cardiac and smooth muscles similar?
A) Both are connected to bones.
B) Both are involuntary.
C) Both have only thin protein filaments.
D) Both are typically under conscious control.
E) Both use cyclic adenosine monophosphate (cAMP) as an energy source.
B
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Answer the following statements true (T) or false (F)
1. During gastrulation, muscle cells and connective tissues are formed from the endoderm. 2. Sand dollars, a kind of marine echinoderm, release their gametes into the surrounding water to be fertilized through spawning, producing large numbers of offspring. They do not care for their young, many of which are eaten by predators. Therefore, this organism exhibits a type III survivorship curve. 3. A graph of a typical exponential growth curve will be J-shaped, as exhibited in the early growth pattern of bacteria. 4. The chance of survival of an individual sparrow during an unusually hot summer is independent of that species’ population density. 5. Economic development in a country can change its population’s age structure to a conical shape.
PTH (parathyroid hormone) does all of the following
EXCEPT a. stimulates calcium release from bones. b. suppresses calcium reabsorption by the kidneys. c. enhances osteoclast action. d. activates vitamin D in the gut. e. indirectly stimulates calcium absorption by the gut.
The organisms that cause strep throat, pneumonia, and botulism are
A. viruses. B. bacteria. C. protozoa. D. fungi.
A shared ancestral character is
A) a character that originated in an ancestor of two taxa. B) shared by all mammals but not found in their ancestors. C) an evolutionary novelty unique to a clade. D) an outgroup character.