Tissues: Plants and Animals

Question 1

Two types if plant tissues

Answer 1

MERISMATIC( Multiply to produce new cells)
PERMANENT(Non-dividing, Specialized)

Question 2

Where are meritmatic tissue found

Answer 2

• gROWING points of a plant(roots,stems and branches)
  -Between bark and wood of trees

Question 3

Characteristics of meristenstic tissues

Answer 3

1. Cells are small
   2.Cells are usually cubical
2. Cell walls are thin
3. Nuclei are large
   5.Vacuoles almost absent
   6.no intercellular space
   7.actively divide
4. New cells are transformed into permanent cells

Question 4

Meristematic tissues can be classified into two categories, name them.

Answer 4

1. Apical for terminal meristem - near tips of roots and stem. Axillary bud. Tips of stem.
2. Lateral or Cambium meristem - situated below the bar and responsible for increasing girth. or diameter of stem

Question 5

What are the three types of permanent tissues?

Answer 5

1. Protective tissues.
2. Supportive tissues.(collenchyma, sclerenchyma and parenchyma)
   3, conductive tissues

Question 6

Protective tissues, explain

Answer 6

1. Cells with thick walls.
2. Bound on the surface of root stems and leaves.
3. Example epidermis of leaves which secrets a waxy waterproof material.

Question 7

Explain parenchyma

Answer 7

1. Thin wall cells. Oval.
2. Large, single vacuole.
3. Soft parts of the plant cortex and the pith
4. May store food in as in potatoes.
5. Provide temporary support to the plant.
6. Sometimes, sometimes they contain chlorenchyma

Question 8

Explain collenchyma

Answer 8

1. Made up of cells, which are elongated and cell wall is thick at the corners.
2. Found the leaf stocks and below the epidermis of stems.

Question 9

Explain sclerenchyma

Answer 9

1. Composed of long narrow cells, which are dead
2. Thick walls to the deposition of lignin
3. Provides strength to all parts of plants.
4. Found in stems and veins of the leaf.

Question 10

Are all supporting tissues made up of only one type of cells

Answer 10

Yes

Question 11

What are conducting tissues? What are they also called?

Answer 11

Consist of xylem and phloem. Vascular tissues.

Question 12

Explain xylem

Answer 12

1. Elongated and thick walled
2. In the form of tubular passages
3. Provide upward movement.

Question 13

Parts of the xylem

Answer 13

1. Tracheids
   2.xylem vessels
2. Parenchyma
3. Xylem Fibres

Question 14

Explain Tracheids

Answer 14

1. Elongated den cells.
2. Highly lignified cells
3. Provide mechanical support.

Question 15

Explain xylem vessels

Answer 15

1. Transportation.
2. Elongated cells.
3. Cells are hard thick and lignified.
4. Transverse walls get dissolved and make a continuous water pipe.

Question 16

Xylem, parenchyma explain

Answer 16

1. Living cells.
2. Storage of food.
3. Help in conduction.

Question 17

Xylem fibres

Answer 17

1. Dead sclerenchyma cells
2. Thick walled- long narrow cells.
3. Provide mechanical support

Question 18

Explain phloem

Answer 18

1. Seive tubes
2. Companion cells.
3. Phloem Parenchyma
4. Phloem Fibres

Question 19

Explain seive tubes

Answer 19

1. Elongated cells placed into end.
2. Transverse walls called C plates are perforated.
3. Help in transport of food from leaves to storage organs.

Question 20

Explain companion cells

Answer 20

1. Living parenchyma
2. Help in functioning of seive tube

Question 21

Explain phloem parenchyma

Answer 21

Storage of starch, food, fat, and other organic food material
Translocation sideways

Question 22

Explain phloem fibres

Answer 22

Provide support