The rate of cell division varies greatly in different types of human cells, the data table below shows the replacement rates of many types of human cells.a- Which cell type has the shortest cell cycle?

a- A scientist was examining the offspring of an organism, suggest how to determine the type of reproduction by which these offspring were produced.

Question 12 Apply: Level 1-2 Why does the menstruation occur after the infertile phase?

The rate of cell division varies greatly in different types of human cells, the data table b- If you were asked to add one more cell that divides by meiosis to this data table. below shows the replacement rates of many types of human cells.

Question 15 Analyze: Level 7-8 A pharmacist discovered a medicine for a certain bacteria that reproduces asexually, he tested this medicine and found it to be

a. Solve: Some students were observing a diagram demonstrating the 2 types of cell division. How many cells are produced by the meiotic cell division (meiosis)?

Question 13 Apply: Level 3-4 By observing the 3 phases of the menstrual cycle, in which phases will it be impossible for this woman to get pregnant.

b- By observing the human karyotype, suggest how to determine the gender (Male or female).

Question 14 Interpret: Level 5-6 Is it possible for a woman to experience a delay

A biologist was examining the somatic cells of a newly discovered species of insects, he found 68 chromosomes in these cells, how many chromosomes will be found in the egg cells of this newly discovered species.

How Many pairs of autosomes are there in this karyotype?

a- If you were observing different cells during their cell cycle suggest how to differentiate between the interphase and the prophase.

If you were given the number of the following nitrogenous bases in a DNA molecule (Adenine, thymine and Guanine), suggest how to find the number of cytosine bases in the same molecule.