BIO_Additional

18問 • 1年前

Claire

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STAGES OF DEVELOPMENT

1. Gametogenesis 2. Fertilization 3. Cleavage 4. Gastrulation 5. Organogenesis 6. Growth

Stage of development that yields haploid gametes

Gametogenesis

Stage of development that results in a unicellular diploid zygote

fertilization

Stage of development involving a series of mitotic divisions to produce a multicellular blastula from a unicellular zygote

cleavage

Stage of development involving morphogenetic movements of the cells to produce a gastrula with distinct germ cell layers; in vertebrates, this will result in three layers: the outermost ectoderm; the inner endoderm, and the middle layer, the mesoderm

Gastrulation

Stage of development where the different germ layers differentiate into specific organ systems.

Organogenesis

Stage of development characterized by an increase in size of an individual

Growth

collective term for the external female genitalia.

Vulva

a pair of thick fatty ridges, enclose and protect the rest of the vulva

Labia Majora

the vaginal opening and the separate opening of the urethra are located with a cavity bordered by a pair of slender skin folds.

Labia Minora

a thin piece of tissue, covers the vaginal opening in humans at birth.

Hymen

located at the top of labia minora

Clitoris

Vestibular Gland

secrete lubricating mucus.

Life cycle where the haploid stage (gametophyte) is multicellular and the only diploid stage is the fertilized egg cell

Haplontic life cycle

Life cycle that includes multicellular diploid (sporophyte) and haploid (gametophyte) generations

Haplodiplontic life cycle

Life cycle where the diploid stage (sporophyte)is multicellular and the haploid stage (gametophyte) is represented by the single-celled garnetes

Diplontic life cycle

The microsporangium in the anther contains numerous microsporocytes. Each microsporocyte will undergo meiosis to produce four haploid microspores each microspore develops into a pollen grain (containing two sperm nuclei and one tube nucleus)

Male gametophyte

The megasporangium in the ovule contains megasporocytes. One megasporocyte will undergo meiosis to produce four haploid megaspores three megaspores degenerate remaining megaspore divides mitotically three times, an embryo sac with eight haploid nuclei membranes partition to make the embryo sac multicellular

Female gametophyte

BIOLOGY_ plants

BIOLOGY_ plants

CPAR_ lesson 1

CPAR_ lesson 1

CPAR_ lesson 2