Plant tissue

Question 1

Diploid

Answer 1

containing two complete sets of chromosomes, one from each parent.

Question 2

Haploid

Answer 2

having a single set of unpaired chromosomes

Question 3

Lycophytes

Answer 3

seedless vascular plants
Independent, branched sporophyte
* Independent gameteophyte (for the most part)
* Sporophyte dominant life cycle
* Lignified vascular tissue, tracheids, roots
* Some with strobili (evolved multiple times)
* Some with heterospory (evolved multiple times)
* Lycopodium – strobilus and homosporous
* Selaginella – strobilus and heterosporous
* Isoetes – no strobilus and heterosporous

Question 4

Development of tracheid

Answer 4

-Water-conducting cells with a lignin-containing secondary wall in addition to
primary cell wall
-Pits in sides and ends of cell where water can flow

Question 5

Xylem

Answer 5

-Xylem provides passive water conduction via evapotranspiration
-Xylem also provides structural support

Question 6

phloem

Answer 6

the vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves.

Question 7

What is a major difference between lycophytes and ferns?

Answer 7

Lycophytes have microphylls (leaves with single unbranched veins), while other vascular plants (ferns, gymnosperms and angiosperms) have megaphylls (leaves with multiple branched veins). Lycophytes have microphylls, while ferns and other vascular plants (gymnosperms and angiosperms) have megaphylls.

Question 8

strobilus

Answer 8

collection of sporophylls, produce pollen grains and megasporophylls producing ovules

Question 9

sporophylls

Answer 9

leaf with sporangium, a leaf that produces spores (2N)

Question 10

sporangium

Answer 10

spore container, a receptacle in which asexual spores are formed

Question 11

Pterophytes

Answer 11

• Ferns
• Independent, branched sporophyte
• Independent gametophyte (for the most part)
• Sporophyte dominant life cycle
• Branched veins in leaves (allows large size)
• Most homosporous, but some heterosporous

Question 12

Spore mother cell

Answer 12

undergoes meiosis to make spores, produces four haploid daughter cells

Question 13

Microspores

Answer 13

small haploid spores that develop into male gametophytes

Question 14

Megaspores

Answer 14

small haploid spores that develop into female gametophytes

Question 15

Megasporophyll

Answer 15

a leaf on which the megaspores are formed

Question 16

Microsporophyll

Answer 16

a leaf on which the microspores are formed

Question 17

Megasporangium

Answer 17

produces spores that develop into megagametophyte

Question 18

Microsporangium

Answer 18

produces spores that develop into microgametophyte