Michael took a swab of bacteria from a Petri dish and placed it on a glass slide. Then he treated the sample with a series of dyes. For which type of microscope is the sample prepared?
A.
scanning electron microscope
B.
compound microscope
C.
dissecting microscope
D.
transmission electron microscope

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction

Pulmonary arteries carry highly oxygenated blood. true or false?