Pls 2 Exam 1

Front 1

which factors affect the rate of diffusion?

Back 1

1. concentration differences across a barrier
2. resistance of the barrier
3. area of the barrier

Front 2

what structure connects the cytoplasm of adjacent cells?

Back 2

plasmodesmata

Front 3

what are the three types of plant cells?

Back 3

parenchyma, collenchyma, sclerenchyma

Front 4

the xylem is composed of what cells?

Back 4

fibers, tracheids, vessels element, rays

Front 5

the phloem is composed of what cells?

Back 5

sieve tube companion cell, fiber

Front 6

ray flowers in a composite head are usually

Back 6

sterile

Front 7

what gives rise to secondary growth?

Back 7

vascular cambium

Front 8

cotton is derived from what mature cells

Back 8

fibers

Front 9

the stem between nodes is called the:

Back 9

internode

Front 10

the emerging stem of a hypogeal seed is called the:

Back 10

epicotyl

Front 11

monocot stems have:

Back 11

scattered vascular bundles

Front 12

in response to evolution, plants do what?

Back 12

modify and adapt existing structures

Front 13

why does the root quickly emerge from a germinating seed?

Back 13

to absorb water

Front 14

where are root hairs formed?

Back 14

zone of cell maturation

Front 15

branch roots arise from the:

Back 15

pericycle

Front 16

root hairs arise from the:

Back 16

epidermis

Front 17

what protects the emerging leaves in the germinating monocot grass seed?

Back 17

coleoptile

Front 18

what protects the emerging root in the germinating monocot grass seed

Back 18

coleorhiza

Front 19

what is the function of the endosperm?

Back 19

nourish the developing embryo

Front 20

what is a fruit?

Back 20

an ovary and associated tissues

Front 21

what is a reproductive flower part out of the following: pedicel, receptacle, sepals, petals, pistil

Back 21

pistil

Front 22

what are the four most common gases in the atmosphere?

Back 22

carbon dioxide, oxygen, nitrogen, argon

Front 23

what are ubiquitous energy carriers in all living organisms?

Back 23

ATP & NADH

Front 24

what characterizes a domesticated plant?

Back 24

high yields, large size, easy to store, uniform germination

Front 25

the second law of thermodynamics states:

Back 25

entropy increases

Front 26

what two statistics are used to describe a population?

Back 26

mean and standard deviation

Front 27

which crops did not originate in the americas?

Back 27

rice

Front 28

what is essential for the formation of a successful graft union?

Back 28

formation of a continuous vascular cambium

Front 29

specialized structures in the monocot grass seed:

Back 29

coleoptile, coleorhiza, aleurone layer, scutellum

Front 30

functions of a seed

Back 30

dispersal, reproduction, replication, protection

Front 31

bottom part of a graft is called:

Back 31

stock

Front 32

a breeding line is identical in which genes?

Back 32

selected genes

Front 33

hypogeal and epigeal are two forms of:

Back 33

seedling emergence

Front 34

what characterizes a seed?

Back 34

an embryo, nutritive tissue, protective structure

Front 35

what is alternation of generations?

Back 35

alternation between haploid and diploid phases

Front 36

perfect flowers must have what parts?

Back 36

pistil and stamen

Front 37

A corn plant is an example of a:

Back 37

monoecious plant