A tissue consists of interacting cells and
a. blood cells.
b. pigmented skin cells.
c. extracellular substances.
d. nerve cells.
e. none of these.
C
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You are a doctor who examines a swollen and warm puncture wound on the hand of a patient. Which is not a response of the patient's immune system to this injury?
A. The adaptive immune system immediately began making lots of antibodies. B. Phagocytes attacked foreign cells that entered the wound. C. The innate immune system triggered an inflammation response. D. Epidermal cell division is inhibited at the wound site.
Explain how hagfish are still able to consume their dead or dying prey, even though hagfish lack jaws
What will be an ideal response?
Body cells of human males contain
a. one X chromosome and one Y chromosome. b. two X chromosomes. c. two Y chromosomes. d. two O chromosomes. e. chromosomes X, Y, and O.
Which of the following is NOT a characteristic of bacterial chromosomes?
A. they contain gene coding regions and regulatory regions B. they are around 10× smaller than eukaryotic chromosomes C. they are single-stranded D. they have 10-base-pair regions that control DNA folding E. they have only one origin of replication