Question

The follicle stimulating hormone that causes primary oocytes to develop is released by

		the ovaries.
		the adrenals.
		the pituitary.
		the uterus.

Birds reproduce primarily by

		self-fertilization
		parthenogenesis
		internal fertilization
		external fertilization

Which structure is the female reproductive structure in which an embryo develop?

		fimbrae
		placenta
		fallopian tube
		uterus

Vera is infertile and imaging of her ovaries has shown that she fails to develop large egg follicles. Most likely her ovaries are failing to respond to what hormone?

		estrogen
		progesterone
		hCG
		FSH

Sex determination in ____________ is genetically caused by the combination of Z and W chromosomes.

		amphibians
		invertebrates
		birds
		mammals

A hermaphrodite is

		a male organism.
		a female organism.
		both male and female.
		an asexual organism.

Which is not one of the three embryological germ layers?

		endoderm
		hypoderm
		mesoderm
		ectoderm

The nervous system is derived from which germ layer?

		endoderm
		hypoderm
		mesoderm
		ectoderm

Gerome is studying survival and adaptation of a lizard species that reproduces by parthenogenesis, producing females only. If significant climate change were to occur, what might be the prognosis for this species?

		High genetic variability would favor survival of those genotypes capable of surviving in the new climate.
		Low genetic variability may result in a major die-off.
		The lack of a need for finding mates would enable survival under any climatic conditions.
		Hermaphroditism would result in the ready availability of mates.

One of the advantages of sexual reproduction is

		genetic cloning.
		genetic variability.
		very rapid population growth.
		the ability to flood a population with a successful genotype.

A form of asexual reproduction in which an organism splits into two separate organisms or two parts that regenerate the missing portions of the body is called

		fragmentation
		budding
		fission
		fusion

Which term defines the state of having both male and female reproductive structures within the same individual?

		parthenogenesis
		hermaphroditism
		unisexualism
		bigonadism

Each time Noranda becomes pregnant she soon experiences a spontaneous abortion due to failure of the corpus luteum. Most likely production of which hormone is inadequate?

		estrogen
		progesterone
		hCG
		FSH

Sea stars undergo a type of asexual reproduction called

		fragmentation
		budding
		fission
		parthenogenesis

Skin is derived from which germ layer?

		endoderm
		hypoderm
		mesoderm
		ectoderm

The digestive system is derived from which germ layer?

		endoderm
		hypoderm
		mesoderm
		ectoderm

Answer 1

Answer 1. The pitutary. There are 2 hormones produced by the pitutary gland , follicle stimulating hormone (FSH) and lutenising hormone (LH) helps in the development of primary follicles.

2. Internal fertilization. Birds reproduce by internal fertilization,in here the egg is fertilized inside the egg itself.Just as in reptiles, birds also have cloaca that is a single exit and entrance for sperm, eggs, and waste.

3. Uterus. The female reproductive system has two main parts: the uterus, in which a embryo develops, and it also produces vaginal and uterine secretions.

4. FSH. FSH is a hormone that is released by the pituitary gland and helps in stimulation of the follicular growth in your ovaries. Women that have to deal with premature ovarian failure often have abnormally high levels of FSH in the blood stream.

5. Birds.  determination of the sex of offspring is done by a chromosomal system called the ZW sex-determination system in birds. The ovum determines the sex of the offspring.

6. Both male and female.  A hermaphrodite is an organism that has complete or partial reproductive organs and it produces gametes with both male and female sexes.

7. Hypoderm. It is the same as ectoderm.

8. Ectoderm. It has a precursor of mammary cells and also forms central and peripheral nervous system.

9. Genetic variability. By the sexual mating of 2 different individuals, genetic variability occurs.

10. Budding. A new individual forms from the same organism by the budding and regeneration. Eg. in yeast.

11. Ectoderm. Skin is the outermost part of the body, helps in protection and is formed from the ectoderm layer.

12. Endoderm. The lining of the digestive tract is formed by the endoderm during gastrulation.

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