lesson 6 unit 4 A

binary fission

asexual reproduction in which a single cell divides into two with no exchange of genetic material; reproduction method of bacteria

The process of a parent cell dividing into a large number of genetically identical cells all at once is known as _____ .

multiple fission

budding

A kind of asexual reproduction involving the growth of a new individual from part of an older organism. It can also refer to uneven distribution of cells that results in one cell receiving most of cell contents. In grafting, budding involves reducing the scion to a singular bud.

Four principal advantages of asexual reproduction are:

reproduction at a rapid rate reproduction in harsh climates reproduction with only one parent reproduction genetically of identical offspring

central disk

The central portion of a starfish. The arms of a starfish radiate from the central disk.

All of the following are basic types of asexual reproduction in lower organisms except:

egg-laying

When an organism of many cells breaks up into two or more parts, and when these parts survive to produce a new organism, reproduction occurs by .

regeneration

colony

A group of organisms attached to one another after undergoing asexual reproduction from a common parent.

multiple fission

A kind of asexual reproduction in which a single cell undergoes many mitotic divisions in the nucleus and a number of daughter cells are produced all at once.

protist

A one- or few-celled organism with chromosomes. Many have characteristics of both animals and plants.

regeneration

A phenomenon in which organisms break into two or more parts and then each part grows into a new individual.

spore

A small, resistant cell that can grow into a new organism. They may be produced either by meiosis or mitosis.

conidia

A special kind of asexual spore found in many kinds of fungi.

Asexual reproduction requires gametes but not fertilization.

False

Colonies occur when an animal produces many young asexually and they become detached from the original (parent) animal and result as an independent mass.

False

Large variations in a crop may be developed by employing asexual reproduction.

False

unicellular

One-celled.

propagation

The act of propagating or establishing and growing new plants.

A common fruit that can only reproduce asexually is Thompson seedless grapes.

True

Asexual reproduction always yields offspring which are identical to their parent.

True

Occasionally asexual reproduction can cause undesirable proliferation of an organism.

True

The simplest form of asexual reproduction is called _____ .

binary fission

Offspring which arise as a contiguous outgrowth of the parent is called .

budding

Mitosis

is a type of cell division used in asexual reproduction.