Which of the following is an example of cardiac output?
a. The hummingbird heart beats approximately 800 times per minute.
b. During exercise, the heart rate in humans can double.
c. The human heart pumps about 1500 gallons of blood per day.
d. All of these are examples of cardiac output.
C
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Bats use high ultrasonic sounds to perceive their environment via a process known as ____
a. sound reflection navigation b. extrasensory perception c. echolocation d. ultralocation e. auditory navigation
A cell in G1 phase has the option of entering which two phases?
What will be an ideal response?
There is concern over the use of 2,4-D, a synthetic plant hormone, as a weed killer because the by-product dioxin
A) can cause irreversible mutations in crop plants. B) causes fruit to drop prematurely from plants. C) can cause birth defects and leukemia in mammals. D) weakens the shells of the eggs of predatory birds, resulting in the death of their offspring.
Spectral karyotypes take advantage of which of the following?
A) Probes can be made with different radioactive isotopes. B) Probes can be labeled with different color fluorophores. C) Chromosomes can be labeled with different radioactive isotopes. D) Chromosomes are different colors under a microscope.