Bio 1116 Exam 1

Which cells lack living protoplasts at maturity?

Sclerenchyma

What will happen if a cell with a solute potential of -0.4 MPa and a pressure potential of 0.2 MPa is placed in a chamber filled with pure water that is pressurized with 0.5 MPa?

Water will flow into the cell

First phase of fungal invasion

Windblown spore lands on leaves

The first step in the signaling pathway is...

Wounded leaves produce an 18-amino acid called systemin

Plant organs form by

cell division in meristematic tissue

Plant cell walls are made up of

cellulose

What moves carbohydrates?

phloem

Unlike eudicot stems, monocot stems lack

pith

Meristem cells have secondary cell walls for...

protection

In vascular plants, one difference between root and shoot systems is that

root systems undergo secondary growth, but do not form bark

All plants have

dermal tissues

Casparian strips are found in the

Endodermis

The fourth step in the signaling pathway is....

Jasmonic acid turns on genes for proteinase inhibitor

Indeterminate growth is possible because

Meristematic cells continually replace themselves

Mineral soil particles are typically

Negatively charged

The inner most layer of the ground cortex is called

endodermis

Palisade and spongy parenchyma are typically found in the mesophyll of

eudicots

Photorespiration occurs when

Rubisco binds with oxygen

How does ricin work?

It prevent cells from making the proteins that they need

What proportion of the soil volume is occupied by air and water?

50%

What plants secrete chemicals to block seed germination or inhibit growth of nearby plants

Allelopathic plants

Water movement through cell walls is

Apoplastic

Which is more detrimental to plants: biotic or abiotic factors

Biotic factors

In a C4 plant, the Calvin Cycle occurs in

Bundle sheath cells

Guttation is most likely to be observed on a

Cool summer night

What is the third-largest source of food carbohydrates in the tropics?

Cassava

The formation of an air bubble in the xylem is called

Cavitation

The third step in the signaling pathway is...

Cell receptors produce jasmonic acid

Hydrogen bonding between water molecules results in

Cohesion

Fourth phase of fungal invasion

Hyphae differentiate into haustoria

Third phase of fungal invasion

Hyphae grow through cell walls and press against cell membrane

What animals protect plants?

Paraitoid wasps and caterpillars

What is the correct sequence of cell types encountered in an oak tree, moving from the center of the tree out?

Pith, primary xylem, secondary xylem, vascular cambium, secondary phloem, primary phloem, cork cambium, cork

One potential problem with using poplars to remove TCE from soils is that

Some TCE enters the atmosphere via the transpiration stream

Second phase of fungal invasion

Spore germinates and forms adhesion pad

The second step in the signaling pathway is...

Systemin moves throughout the plant in the phloem

Stomata open when guard cells

Take up potassium

What would be the consequence of removing the Casparian strip?

There would be less selectivity as to what passed into the xylem

A plant must expend energy to drive

Translocation

A wound response occurs when....

a leaf is chewed or injured

The hypersensitive response leads to....

a very rapid cell death around the site of attack

The function of guard cells is to

allow carbon dioxide uptake

A hormone that causes the plant to bend towards the light is called

auxin

Root hairs and lateral roots are similar in each respect except

both are multicellular

Root hairs form in the zone of

maturation

Mutually beneficial association between roots and soil fungi are called

mycorrhizae

Roots differ from stems because roots lack

nodes

You can determine the age of an oak tree by counting the annual rings of _______ formed by the ________

secondary xylem; vascular cambium

What are the two systems in a vascular plant?

shoot system and root system

The food-conducting cells in an oak tree are called

sieve-tube members

The water potential of a plant cell is the

sum of the pressure potential and solute potential

What moves water and dissolved materials?

xylem