BIOA02H3 : Lec04 - Plant Cells and Plant Tissues II.doc

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periwinklealpaca748

22 Apr 2012

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BIOA02H3 Full Course Notes

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Slide one epidermis (root / shoots / leaves) Slide three epidermal hairs (root: nutrient and water uptake, some cells instead of being platelet cells, become single cell thick root hairs, the zone where the root takes up nutrients are limited to root hairs. Slide four epidermal glands: glands are the heads filled with liquid on a stalk, glands are the organ that produces thc (in hemp cannabis sativa) Slide five stinging hairs: act as protection against herbivores, stinging nettle made of silica nettles and injects chemicals inside skin of animal attacking it. Slide six conical epidermis: act as a source of attraction, conical epidermis creates a velvety sheen. Slide seven epidermal platelets: protection against the sun (too much light, silverberry grows in the open and suffers water shortage, it grows its epidermis into large platelets that protect the epidermis underneath from water loss.

Related Questions

1. Although melanocytes are the cells that produce melanin, the cell that actually concentrate the melanin in the apical region of the cell to protect the cell nucleus are _______?

2. Match the definition

__A cell located in the epidermis that produce melanin

__ an epithelial cell composing the majority of the epidermis

__ a fold of the epidermis that interdigitates with dermal papillae

___ a "nipplelike" extension of the dermis into the epidermis

A. dermal papilla

B. epidermal ridge

C. kerantinocyte

D. Melanocyte

3. The _________(papillary/reticular) layer of the dermis is the thickest layer of the dermis.

sangriaraccoon992

Short answers( Just few words) Basic bio, answer them all and I will rate you

1-What type of tissue is the epidermis? What germ layer is it derived from?

2-What does it mean that the epidermis is avascular? Virtually all cells of the human body are within 20 Âµm of a capillary. Do some of the cells of the epidermis fly in the face of this general rule?

3-Epidermal ridges and dermal papillae increase the surface area for attachment of the epidermis to the dermis. What are the structures that lag the epidermis down to the dermis?

4-What is the most apical stratum of the epidermis? Visceral? Which layer is not present in thick skin?

5-Thick skin has five strata and thin has four, but this is not the primary reason why thick skin is so much thicker than thin skin. What is the primary reason?

6-What is the most abundant cell in the epidermis of your skin? What other cells are located in the epidermis? In which stratum are the cells you identified located?

7-How long does it take a keratinocyte produced in the stratum germinativum to be sloughed off the surface of the epidermis?

Bark, which is thicken, toughen periderm, arises from this lateral meristem?

		Vascular cambium
		Cork cambium

QUESTION 2

Seeds with edible fruit are most likely dispersed by

		wind
		animals
		water
		bursting

QUESTION 3

Seeds with wings are most likely dispersed by

		wind
		animals
		water
		bursting

QUESTION 4

The arrangement of flowers on the stem with the newest flowers near the end of the shoot is

		Determinate inflorescence
		Indeterminate inflorescence

QUESTION 5

The arrangement of flowers on the stem with the oldest flowers near the end of the shoot is

		Determinate inflorescence
		Indeterminate inflorescence

QUESTION 6

The cortex in stems is made of this tissue

		Dermal
		Ground
		Vascular

QUESTION 7

The epidermis, cuticle, guard cells, root hairs and trichomes arise from this type of meristem?

		Protoderm
		Ground meristem
		Procambium

QUESTION 8

The epidermis, cuticle, guard cells, root hairs and trichomes arise from this type of tissue?

		Dermal
		Ground
		Vascular

QUESTION 9

The parenchyma, collenchyma and sclerenchyma arise from this type of meristem?

		Protoderm
		Ground meristem
		Procambium

QUESTION 10

The parenchyma, collenchyma and sclerenchyma arise from this type of tissue?

		Dermal
		Ground
		Vascular

QUESTION 11

The xylem and phloem in leaves are contained in which structure?

		blade
		petiole
		stipules
		vein

QUESTION 12

This meristem is located in the root and shoot tips.

		Apical meristem
		Lateral meristem

QUESTION 13

This meristem is located in the stems of plants that live longer than one year.

		Apical meristem
		Lateral meristem

QUESTION 14

Xylem and phloem elements arise from this type of meristem?

		Protoderm
		Ground meristem
		Procambium

QUESTION 15

Xylem and phloem elements arise from this type of tissue?

		Dermal
		Ground
		Vascular

BIOA02H3 : Lec04 - Plant Cells and Plant Tissues II.doc

BIOA02H3 Full Course Notes

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