subject
Biology, 26.08.2019 23:50 alexmoy45p8yd7v

Ascientist wants to examine living cells lining the respiratory tract to determine how the cells use tiny hairs to move dirt and mucus away from the lungs. which of the following instruments would be best, and why?
a. a scanning electron microscope, because it can be used to observe whole cells without slicing them
b. a transmission electron microscope, because it has high resolution

ansver
Answers: 1

Another question on Biology

question
Biology, 21.06.2019 19:30
Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?
Answers: 1
question
Biology, 21.06.2019 22:00
Why is excretion necessary to maintain homeostasis?
Answers: 1
question
Biology, 22.06.2019 06:40
Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.
Answers: 3
question
Biology, 22.06.2019 09:10
Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10
Answers: 2
You know the right answer?
Ascientist wants to examine living cells lining the respiratory tract to determine how the cells use...
Questions
question
History, 13.02.2020 18:39