Note that the scale bar under the photo is labeled 1 μm (micrometer). the scale bar works the same way as a scale on a map, where, for example, 1 inch equals 1 mile.
a) in this case the bar represents a much smaller distance.
b) what is the approximate diameter of the mature parent cell?

satellites are frequently used to make observations of the orbit on earth

the correct answer is b

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set