Chapter 25: Plant Nutrition and Transport

Question 1

Where do plants mainly obtain hydrogen and oxygen from?

Answer 1

water

Question 2

Where do plants obtain nitrogen from?

Answer 2

bacteria

Question 3

Soil Solution

Answer 3

the solution of dissolved minerals (ions) in the water surrounding the plant roots

Question 4

Essential element

Answer 4

if a plant is deprived of this, it experiences like separation anxiety and its normal routines are disrupted
can’t be replaced by something else (can’t get another you in a minute)

Question 5

Macronutrients

Answer 5

a type of essential element 
concentration of at least 1 gram per kilometer in dry matter
NItrogen 
Phosphorous 
Potassium
Sulfur 
Calcium
Magnesium

Question 6

Micronutrients

Answer 6

Concentrations of less than .1 g/kg of dry matter 
Iton
Chlorine 
Manganese 
Zinc 
Copper 
Nickel 
Molybdenum

Question 7

Fertilizer

Answer 7

supplements that provide missing nutrients

Question 8

Hydroponically

Answer 8

Grow plants in vats of water and random stuff (read: nutrients)

Question 9

What is super cool about soil?

Answer 9

Anchorage
that soil solution
O2 in the spaces in soil
the services of other soil organisms, including bacteria

Question 10

Soil profile

Answer 10

like all soils have a facebook

certain horizontal layers that almost all of them have

Question 11

horizons

Answer 11

horizontal soil layers

several are recognizable in many soil types

Question 12

A horizon

Answer 12

topsoil
supports plant’s mineral and nurtrient needs
living and dead organic matter

Question 13

B horizon

Answer 13

subsoil
accumulates materials from the topsoil above and parent rock below
like a collector

Question 14

C horizon

Answer 14

parent rock
soil comes from this
rocks

Question 15

Mechanical Weathering

Answer 15

physical breakdown of materials by wetting drying and freezing
breaks rock into soil particles

Question 16

Chemical Weathering

Answer 16

the alteration of chemistry in materials of the rocks by oxidation, water, and acids
breaks rock into soil

Question 17

Fertility

Answer 17

ability of soil to support plant growth

Question 18

Leached

Answer 18

soil solution washed away from A horizon

Question 19

Loam

Answer 19

soil that is a perfect mix of sand silt and clay

Question 20

Humus

Answer 20

what soil organisms break dead and organic matter down to

used by microbes

Question 21

strigolactones

Answer 21

stimulate rapid growth of fungal hyphae toward the root

prodcuts of some genes give