Bio 3201 UNIT 1A pt3

Lytic Cycle

A viral reproduction cycle where the virus injects its DNA/RNA into a host cell, takes over the cell's machinery to produce new viruses, and ultimately destroys the host cell.

Lysogenic Cycle

A viral reproduction cycle where viral DNA becomes part of the host cell's DNA, can exist for years without harm, and may later undergo the lytic cycle.

Advantages of Sexual Reproduction

Sexual reproduction allows adaptation to a changing environment, reduces competition among siblings, and offers opportunities for chromosome repair.

Advantages of Asexual Reproduction

Asexual reproduction is quicker, requires less energy, and maximizes offspring survival chances through methods like budding.

Perfect Flower

A flower with both male and female reproductive structures capable of self-pollination.

Imperfect Flower

A flower with either male or female reproductive structures only.

Stigma

The sticky part of the pistil that traps pollen for reproduction.

Style

The tube leading from the stigma to the ovary, providing a passage for pollen.

Ovary

The reproductive structure containing eggs and site of fertilization in a flower.

Anther

The part of the stamen that produces pollen for fertilization.

Pollen

Contains male sex cells and is created within the anther through meiosis.

Pollination

Occurs when pollen lands on the female reproductive structure of a plant of the same species.

Egg Formation

In flowering plants, a diploid cell undergoes meiosis to create haploid cells, with one becoming the egg.

Pollen Formation

A diploid cell undergoes meiosis to produce haploid cells, which develop into pollen grains.

Fertilization in Flowering Plants

Involves pollen grains reaching the stigma, forming a pollen tube, and fertilizing the egg to produce a zygote and endosperm.