Biology 102 "Practical Botany" - slide deck 1

seed

contains totipotent cells, making it a collection of stem cells which will regenerate a new plant. Can be a seed, fruit, a piece of stem, or a piece of leaf tissue. In botany, it is an embryo enclosed in one or two layers of integument.

totipotency

The capacity of a cell to differentiate into different cell types to generate an entire organism.

Characteristics of a totipotent cell

thin cell wall, thick cytoplasma (high concentration of molecules), and a small vacuole

Pluripotent cell

can create all cell types except for extra embryonic tissue

Totipotent cells and pluripotent cells are both…

… stem cells

A

Foliage leaves

B

Epicotyl

C

Hypocotyl-root axis

D

Seed Coat

E

2 Cotyledons

A bean has how many cotyledons?

2, making it a eudicot

Parts of an embryo in a seed

Foliage leaves, Epicotyl, Hypocotyl-root axis, and cotyledon(s)

A

Micropyle

B

Hilum

Hilum

“plant belly button”, where the seed/ovule was attached to the placenta

A

Seed Coat

B

Hypocotyl

Accidental blank with a line at bottom of stage 1

Primary root

C

Foliage Leaves

D

Cotyledons

E

Lateral Roots

F

Epicotyl

G

Hypocotyl

H

Withered cotyledon

A

Pericarp/seed coat

B

Coleoptile

C

Plumule

D

Radicle

E

Coleorhiza

F

Scutellum/ cotyledon (1)

G

Endosperm

Corn has how many cotyledon(s)?

One, making it a monocot

Parts of an embryo in a monocot seed/ corn

Plumule, Radicle, Coleorhiza, Scutellum/cotyledon

Endosperm

Part of the seed but not part of the embryo

Pericarp

AKA a fruit wall - a grass seed is actually fruit

A (also D)

Coleoptile

B

Coleorhiza

C

Primary Root

E

First foliage leaf

F

Coleoptile

G

Shoot-borne roots

Bulb is a type of modified

stem

A grape vine cutting is a type of modified

stem

A potato tuber is a type of modified

stem