How do plants obtain nitrogen? a. they remove it from the air b. they absorb it from their roots. c. they fix their leaves. d. they produce it in their stems

She planned to observe the flowers for the next five days for an hour at the same time each afternoon. then she wou the data in a multiple line graph to compare the number of bees that visited each flower. which statement best descr data in this investigation?

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen