Which is an example of a species with K-selected adaptations?
A. dandelion
B. bobcat
C. herring
D. fruit fly
Answer: B
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Under times of great stress or shock, which of the following neurotransmitters interferes with the perception of pain?
A) endocannabinoids B) GABA C) catecholamines D) enkaphalins E) calcium ions
What are the two main divisions of the cell cycle?
A. apoptosis and interphase B. mitosis and cytokinesis C. mitosis and meiosis D. nucleus and cytoplasm E. interphase and cell division
Nerve impulses travel along neurons by the opening of channels that allow sodium ions to flow inward, followed by an outward flow of potassium ions
In order to ensure that the impulse may be produced at any time, sodium is actively transported out of the cell and potassium is transported into the cell by the sodium/potassium pump. Which of the following types of work is performed by the sodium/potassium pump? A) mechanical B) electrical C) concentration D) synthetic E) bioluminescent
During the light-dependent reactions of photosynthesis, a constant supply of electrons is provided by:
a. water. b. oxygen. c. the sun. d. chlorophyll. e. carotenoids