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radicle
In botany, the radicle is the first part of a seedling to emerge
from the seed during the process of germination.
TERM 2
root hairs
DEFINITION 2
absorbs most of the water from the surrounding soil.A root
hair, the rhizoid of a vascular plant, is a tubular outgrowth of
a trichoblast, a hair-forming cell on the epidermis of a plant
root.
TERM 3
chemistry
DEFINITION 3
study of matter
TERM 4
elements
DEFINITION 4
basic substances that cannot be broken down into other
substances.
TERM 5
nucleus
DEFINITION 5
contained in an atom, has unique number of protons and
same number of neutrons
atomic
number
Number of protons found found in the nucleus
TERM 7
charge
DEFINITION 7
electrons have a charge of -1 protons have a charge of +
Neutrons have no charge
TERM 8
uncharged
atom
DEFINITION 8
number of protons = number of electrons
TERM 9
valence level
DEFINITION 9
outermost occupied energy level of an element
TERM 10
covalent bond
DEFINITION 10
when atoms share electrons (like with H2O) Hydrogen shares
its one electron with O. strongest type of chemical bond
first law of thermodynamics
matter and energy can neither be destroyed or created.
TERM 17
2nd law of thermodynamics
DEFINITION 17
law of increasing disorder(entropy) all reactions increase
energy disorder in a system, which tends to diminish it
availability for cellular use.
TERM 18
water properties
DEFINITION 18
tranparent quality doesn't affect process that require light
(photosynthetic)
expands as it freezes so it is less dense than liquid water
High specific heat (resists changes in temperature)
high surface tension (so some organism can rest on top)
polar molecule (dissolves manyorganic/inorganic substances)
will neutralize acid & base when dissolved together
TERM 19
pH scale
DEFINITION 19
concentration of H+ in solution
range from 0-14 (7 is neutral)
less than 7 acidic
more than 7 basic/alkaline
TERM 20
buffer
DEFINITION 20
A buffer is an aqueous solution consisting of a mixture of a
weak acid and its conjugate base or a weak base and its
conjugate acid.
vascular plants
tissue organized to conduct food and water throughout
structure (both ones that produce and don't produce seed)
tracheophytes
TERM 22
Nonvascular plants
DEFINITION 22
bryophytes lack specialized tissue for conduction food/water
mosses, generally only a few centimeters in height
TERM 23
Angiosperms
DEFINITION 23
plants that produce flowers
TERM 24
gymnosperms
DEFINITION 24
produce seeds without flowers
Mostly trees/shrubs with woody stems
