Reproduction Unit Exam

Many tiny plants can be seen developing asexually along the edge of the mother-of-thousands plant leaf, as shown in the photo above. The tiny plants eventually drop to the ground and grow into new plants of the same species. One way this form of reproduction differs from sexual reproduction is

• more genetic variations are seen in the offspring

• there is a greater chance for mutations to occur

• the offspring and the parents are genetically identical

• the new plants possess the combined genes of both parents

The diagram above represents some structures in the human female reproductive system. The processes of meiosis and fertilization are essential in human reproduction. Which option correctly identifies where in the female reproductive system these two processes occur?

• Meiosis - 1, Fertilization - 3

• Meiosis - 2, Fertilization - 5

• Meiosis - 3, Fertilization 4

• Meiosis - 4, Fertilization - 5

The process of embryonic development is represented in the diagram above. The three arrows in the diagram each represent a process known as

• mitotic cell division

• meiotic cell division

• fertilization of gamete cells

• differentiation of tissues

Placenta previa is a medical condition that occurs in some pregnant women. Women with this condition are often placed on bed rest, which prohibits them from any strenuous activity that may cause the blood vessels in the placenta to rupture. If not diagnosed, placenta previa can be a very dangerous condition because the placenta is

• the primary source of oxygen for the mother

• where the fetus obtains milk from the mother

• where nutrients and wastes are exchanged

• the primary source of estrogen and progesterone in the mother

To clone a mammal, a cloned embryo is often put into an adult female of the same species to continue internal development. The structure in which the embryo will develop is the

• ovary

• placenta

• uterus

• egg

As human red blood cells mature, they lose their nuclei. As a result of this loss, which process would be impossible for mature red blood cells to carry out?

• excretion

• respiration

• reproduction

• transport

Which statement is characteristic of reproduction in humans?

• The reproductive cells of males and females differ in chromosome number.

• Males and females produce gametes in the ovaries.

• Males and females produce the same number of gametes.

• The reproductive cycles of males and females are regulated by hormones.

The development of organs and tissues from a zygote includes

• mitosis and differentiation

• mitosis and gamete production

• meiosis and gamete production

• meiosis and fertilization

The human male reproductive system is adapted for the production of

• sperm and the delivery of these cells for internal fertilization

• gametes that transport food to the egg

• zygotes and the development of these cells into a fetus

• hormones that stimulate placenta formation in the male

The diagram above summarizes some of the steps in the development of humans. All the genetic information needed for the organism to develop is first present at

• A

• B

• C

• D