Biology Unit 4 Quiz 3

Once an egg has been fertilized:

1. cytoplasm is always exchanged 2. a zygote is formed 3. a barrier to other sperm forms immediately

The method by which new genes can be acquired by successive generations:

1. has never been documented by the scientific method 2. is known as genetic recombination 3. is called meiosis 4. is sexual reproduction 5. is fertilization

Why is sexual reproduction associated with meiosis?

1. meiosis produces gametes 2. meiosis helps to generate variability

Which statements correspond correctly to sexual reproduction?

1. variations remain within created kinds 2. all genetic information comes from preexisting genes 3. the potential combinations are unlimited

Variations of traits within a population are the result of genetic recombination of ______ genes.

Diploid

Variation produced by sexual reproduction starts:

During meiosis

All the gametes of isogamous organisms are genetically identical.

False

All variations within organisms can be explained by the known principles of genetics.

False

Little genetic variation would occur within a population of animals and plants that is widespread over an area with a great range of different environmental conditions.

False

Science has documented mechanisms by the scientific method, by which new genes can be acquired during reproduction.

False

Some plants and animals can reproduce both asexually and sexually.

False

The genetic information in a gamete is identical to one of the original separated sets of chromosomes in the parent.

False

The human female produces about 10,000 eggs during a lifetime.

False

The genetic requirement for evolution to operate is the acquiring of new ___________ _________ during reproduction.

Genetic information

A species may successfully live in its environment due to

Genetic variation

The fusing together of two gametes at fertilization is called

Sexual reproduction

Successful breeding is limited to the gametes of the same created "kinds" of organisms.

True

The haploid chromosomes of a gamete are formed by ____________ up of the chromosomes of the parent cell, after the_________ phase of division.

a. recombination b. first

The ability of an organism to ___________ to its environment is due to potential variation.

adapt

Plants which produce their gametes in flowers are called

angiosperms

Conjugation is directly opposite to:

binary fission

When gametes fuse or come together to make one cell, ______________ has occurred.

fertilization

The organ which produces gametes in lower plants, some protists, and some fungi is called the

gametangium

Adaptation is possible due to the known mechanism of:

genetic recombination

The most significant characteristic of sexual reproduction is:

genetic variability

Cone bearing plants are classified as

gymnosperms

The condition common to protozoa whereby the cell of the organism acts as a gamete is isogamyfissionconjugationmeiosis

isogamy

The human gametes are:

oogamous

An organ in animals that produces eggs is called the

ovary

A single egg is a(n):

ovum

The function of the larger, more typical pinecone is:

to produce eggs

Three advantages of sexual reproduction are: genetic___________, resistance to unfavorable conditions, and produces disease free seed plants.

variations