Which reason best explains why dead specimens must be used with transmission electron microscopes?

Transmission electron microscope transmits electrons with high intensity towards the specimen. It is chiefly used for dead specimen as if used for living cells energy released from the electrons can damage the cells of the living specimen making the observation and analysis futile. The transmission electron microscopes are used to know the chemical composition and surface characteristics of specimens. These are used for the detection of heavy metal poisons, identification of type of drugs.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.