What portion of the cell contains microtubules and microfilaments?
a. nucleus
b. mitochondria
c. cytoskeleton
d. smooth ER
e. rough ER
ANSWER: c
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As you examine a soil sample under your microscope, you note the presence of tiny, wormlike organisms. You immediately suspect that these creatures are nematodes. The presence of which characteristics would support your hypothesis? Check all that apply.
_____ longitudinal but not circular muscles. _____ separate male and female individuals. _____ shedding of the integument. _____ a tough, collagen-based cuticle. _____ abundant flame cells,
The ____________________ is used to package and ship components to other organelles and out of the cytoplasm
Fill in the blank(s) with the appropriate word(s).
Which of the following is(are) part of the central nervous system?
A) motor system B) brain and spinal cord C) brain only D) spinal cord only
Which of the following statements is false?
A) Immersion oil is used to get a better resolution at high-power magnifications. B) Immersion oil channels as much light as possible up through the objective lens instead of being bent. C) Resolution is the ability to distinguish two distinct points as separate. D) Ultimately, the resolving power of bright field microscopes is limited by the wavelength of visible light. E) Immersion oil has a lower refractive index than the glass slide to help increase sample clarity.