Reproduction & Development Test - Multiple choice - 2

b

A horse has 64 chromosomes. How many chromosomes are in its body cells? a. 32 b. 64 c. 12 d. 8

a

A normal body cell of a fruit fly contains eight chromosomes. Each normal gamete of this organism contains a. four chromosomes as a result of meiosis b. four chromosomes as a result of mitosis c. eight chromosomes as a result of meiosis d. eight chromosomes as a result of mitosis

d

A pathogen passing from a mother to her fetus could cause a. a decrease in the chromosome number of the fetus b. an increase in milk production in the mother c. gamete production to increase d. an infection in the fetus

a

A student looked at dividing onion cells under the microscope and noticed that, they contained rod-shaped chromosomes. It is necessary for onion cells to contain chromosomes because chromosomes a. are composed of genes that contain the instructions for an organism's traits. b. are made of carbohydrates and are needed as an energy source c. direct the production of inorganic molecules within the cell d. are composed of lipids that contain stored nutrients for the new cell.

a

A zygote develops into a multicellular organism through a. mitosis and specialization (same as differentiation) b. mitosis and meiosis c. recombination and communication d. genetic engineering and natural selection

a

Human reproduction usually involves a. internal fertilization and internal development b. external fertilization and external development c. internal fertilization and external development d. external fertilization and internal development

b

If a chemical that interrupts cell division is added to a culture of human liver tissue, which process would stop? a. meiosis b. mitosis c. breakdown of glucose d. diffusion of nutrients

a

If the horse has 64 chromosomes, how many chromosomes are in its sex cells or gametes? a. 32 b. 64 c. 12 d. 8

c

In an embryo, the formation of many types of tissues and organs occurs as a result of the process of a. fertilization b. genetic sorting c. differentiation d. gene recombination

d

In most animal species with internal development, the embryo becomes implanted in the lining of the a. stomach b. ovary c. liver d. uterus

a

In some species very few eggs are produced by the females. Which reproductive pattern is most characteristic of these species. a. internal fertilization followed by internal embryonic development b. internal fertilization followed by external embryonic development c. external fertilization followed by internal embryonic development d. external fertilization followed by external embryonic development

c

Melanoma is a type of cancer in which abnormal skin cells divide uncontrollably. Some chemotherapy drugs, which stop the growth of cancer, directly interfere with the process of a. meiosis b. coordination c. mitosis d. recombination

a

Occasionally, during pregnancy, the placenta can separate from the uterus. This causes a disruption in development and sometimes death of the fetus. Harm to the developing fetus might occur because the placenta a. transfers oxygen and nutrients to the fetal blood b. sends maternal blood into the fetus c. supplies milk for the fetus d. breaks down wastes of the fetus

a

Potatoes were the main crop in Ireland in the 1800s. Although the entire population of Ireland was dependent on a single variety of potato, the "lumper". These potatoes were reproduced by a method of asexual reproduction known as vegetative propagation. In the middle of the 1800s, a disease caused by a fungus killed almost the entire lumper crop within two years. As a result, millions of people in Ireland died of starvation. The most likely reason the potato disease was able to destroy the potato crop in such a short time is that the a. potato population lacked variations b. lumper variety had a long reproductive cycle c. lumper had several variations caused by vegetative propagation d. potato population in Ireland utilized all of the finite resources

c

Sexual reproduction in a species usually results in a. an increase in the chromosome number in the offspring b. offspring genetically identical to the parent c. recombination of genes d. a decrease in biodiversity

c

The healing of a wound in a human is mot similar to the process of a. budding b. synapsis c. regeneration d. sporulation

c

The ovaries produces a. sperm and eggs b. testosterone and eggs c. estrogen, progesterone and eggs d. estrogen, progesterone and testosterone

b

The primary function of the human male reproductive system is to a. provide a site for fertilization b. produce and transport gametes c. protect and nourish the embryo d. prevent urine from leaving the body

b

When an organism reproduces asexually, it usually has a. only one parent, and half as much DNA as the parent b. only one parent, and the same chromosome number as the parent c. two parents, and twice as much DNA as either parent d. two parents, and the same chromosome number as each parent

a

Which factor is a major cause of the changes that occur during puberty, the years when the rate of human physical growth increases and reproductive maturity occurs? a. changes in some hormone levels b. an increase in meiosis in body cells c. a decrease in the rate of metabolism d. change in the gene sequences in reproductive cells

c

Which statement describes a function of the hormone estrogen? a. it regulates the secretion of digestive enzymes b. it promotes sperm production in males c. it influences the development of adult sex characteristics d. it maintains blood sugar levels