Phagocytosis is a process in which a cell
A. takes in foreign particles and destroys them.
B. creates molecules and then excretes them.
C. lyses itself.
D. merges with another cell forming antibodies.
E. adheres to another cell.
A. takes in foreign particles and destroys them.
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Which of the following is one of Chargaff’s
rules?
a. different organisms have different DNA sequences b. the DNA molecule is a double helix c. the two strands in a DNA molecule run in opposite directions d. the backbone of a DNA molecule is on the outside e. all of these are Chargaff’s rules
Which part of the brain adjusts the rate and force of the heartbeat based on the information received from arterial stretch receptors (baroreceptors)?
1.Cerebellum 2.Cortex 3.Medulla 4.Midbrain
A researcher is studying temperature regulation in bumblebees in a meadow ecosystem. She wants to know the average time it takes for the bumblebees to be able to fly after a cool night. Which piece of equipment would be most useful for determining this?
a) stopwatch b) light source c) thermometer d) binoculars
Cells are differentiated after which step in the Gram stain?
a. Alcohol-acetone b. Iodine c. Crystal violet d. Safranin