A
AB
abdomen
ABO system
absorption
adaptation
adrenaline
aerial root
aerobic
aerobic respiration
afterbirth, the
agar
air bladder
air sac
albumen
algae
amino acid
amnion
amniotic fluid
amoeba
amphibian
amylase
anaerobic
anaerobic respiration
animal
annual
antenna
anther
antlers
aquatic
arachnid
arthropod
asexual
asexual reproduction
assimilation
ATP
auxin
axil
B
bacteria
bacterial
bacteriology
barb
barnacle
biennial
bile
binocular vision
bio-
biochemical
biochemistry
biodegradable
biodiversity
biogas
biohazard
biological
biological control
biology
biomass
biorhythm
biotechnology
biotic
biped
bird
blood
blood group
blood pressure
bloodstream
blowhole
botany
bracken
bract
brain
brainwave
branch
breathe
breathing
breed verb
breed noun
breeding
broadleaved
bud
budding
bulb
bush
calyx
cambium
canine
capsule
carapace
carbohydrase
carbohydrate
carbon cycle, the
carbon dioxide
carnivore
carnivorous
carpel
caterpillar
cell
cell division
cell membrane
cellular
cellulose
cell wall
centipede
central nervous system
chemical digestion
chitin
chlorophyll
chloroplast
cholesterol
chromosome
chrysalis
cilium
circulation
circulatory
classification
claw
clone noun
clone verb
cloning
cloven hoof
cnidarian
cocoon
coelenterate
cold-blooded
colony
colour-blind
commensalism
compost
compound eye
compound leaf
conceive
conception
cone
congenital
conifer
consumer
contract
contraction
coral
coral reef
cork
corm
corolla
cortex
cotton
cotyledon
cross
crossbreed
cross-fertilize
cross-pollinate
crustacean
culture
culture medium
cytoplasm
decay
deciduous
decompose
decomposer
defecate
denitrification
denitrifying bacteria
dentition
dicotyledon
diet
digest
digestion
digestive
dispersal
DNA
dominant
dorsal
double helix
Down’s syndrome
dwarf
echinoderm
ecological
ecology
ecosystem
effector
egestion
egg
ejaculate
embryo
embryonic
enamel
endangered species
endoskeleton
endosperm
entomology
enzyme
epiphyte
evergreen
evolution
excrement
excrete
excretion
exhale
exoskeleton
faeces
false fruit
false leg
family
fang
fat
fatty acid
fauna
feather
feeler
feline
female adjective
female noun
ferment
fermentation
fern
fertile
fertility
fertilization
fertilize
fibre
fibrous root
filament
fin
fish
flatworm
fledgeling
flipper
flora
flower noun
flower verb
flowering plant
fly
foetal
foetus
foliage
food chain
food vacuole
food web
fossil
fraternal twin
freshwater
frogspawn
frond
fructose
fruit
fuel
fungi
fungus
gamete
gaseous exchange
gene
genetic
genetic code
genetic engineering
genetic modification
genetics
genome
genotype
genus
germ
germinate
gestation
gill
glucose
glycogen
grow
growth
growth hormone
grub
guard cell
habitat
haemoglobin
hatch
herb
herbaceous
herbivore
hereditary
heredity
hermaphrodite
heterozygous
hibernate
homeostasis
homeothermic
homozygous
hoof
hormone
horn
host
humus
hybrid
hydra
hydrolysis
identical twin
impregnate
impulse
incubate
incubation period
indigenous
inflorescence
ingest
ingestion
inhale
inherit
inheritance
inorganic
insect
insecticide
insectivore
insect pollination
insemination
insulin
intercourse
invertebrate
involuntary
irritability
irritable
jellyfish
keratin
knee-jerk reflex
lactate
lactic acid
larva
lateral line
leaf
legume
lichen
life
life cycle
lignin
lipase
lipid
liposome
loam
locomotion
lymph
lymphocyte
male adjective
male noun
mammal
mandible
mane
mangrove swamp
marine
marsupial
mate noun
mate verb
mechanical digestion
meiosis
melanin
membrane
menopause
menstrual
menstrual cycle
menstruate
menstruation
metabolism
metabolize
metamorphosis
microbe
microbiology
microorganism
migrate
migratory
milk
mimicry
miscarriage
mitochondrion
mitosis
mollusc
monocotyledon
monounsaturated
moss
moult
movement
multicellular
mutant
mutate
mutation
muzzle
natural selection
nectar
nectary
needle
nerve
nervous system, the
nest noun
nest verb
nitrate
nitrification
nitrifying bacteria
nitrogen cycle, the
nitrogen fixation
nitrogenous
nodule
non-flowering
non-identical twin
nucleic acid
nucleotide
nucleus
nutrient
nutrition
nymph
O
oestrogen
offspring
oil
omnivore
omnivorous
optic
optical
order
organ
organelle
organic
organic chemistry
organism
organ system
ornithology
osmosis
ova
ovary
ovulate
ovule
ovum
oxygen
oxygenate
oxyhaemoglobin
pack
pad
pancreatic juice
parasite
parasitic
parasitism
pathogen
paw
pectoral
pectoral fin
pelvic fin
penis
pepsin
perennial
pericarp
period
permeable
perspiration
perspire
pest
petal
phagocyte
phenotype
phloem
photosynthesis
physiological
physiology
pigment
pincer
pinnate
pistil
pith
plankton
plant noun
plant verb
plasma
platelet
plumage
plumule
pod
pollen
pollen tube
pollinate
pollination
polyp
positive
postnatal
predation
predator
pregnancy
pregnant
premature
prenatal
prey
pride
primate
prion
proboscis
producer
product
progesterone
protease
protein
protist
protoplasm
protozoan
protozoon
pseudopodium
puberty
pulse
pup
pupa
pupil reflex
puppy
quadruped
queen
radicle
rainforest
reactant
receptacle
recessive
reflex
refraction
regurgitate
relax
reproduce
reproduction
reproductive
reproductive cell
reptile
respiration
respiratory
respire
response
Rhesus factor
rhizome
ribonucleic acid
RNA
root
rootcap
root hair
ruff
ruminant
runner
sac
saliva
salivary amylase
saltwater
saprophyte
scale
school
scion
season
secrete
secretion
seed noun
seed verb
seed leaf
seedling
segment
self-pollination
semen
semipermeable
sense organ
sensory
sepal
serum
sex
sex chromosome
sexual intercourse
sexual reproduction
shell verb
shell noun
shoot
sibling
silkworm
simple eye
simple leaf
simple sugar
skeleton
snout
social
species
sperm
spinal cord
spine
spineless
spinneret
spiracle
spirogyra
sponge
spore
sprout
stalk
stamen
starch
stem
stem cell
stigma
stimulus
stoma
stomata
style
substrate
succulent adjective
succulent noun
sucker
sucrose
sweat noun
sweat verb
sweating
swim bladder
symbiosis
system
systemic
tail
talon
taproot
teat
tendril
tentacle
terrestrial
territory
testa
testosterone
test-tube baby
thorax
thyroxine
tissue
tissue culture
toadspawn
tolerate
trace element
transgenic
transpiration
transpire
tree
true fruit
true leg
trunk
tuber
tubule
tusk
unicellular
urea
ureter
urinate
urine
vacuole
vascular
vector
vegetable
vegetative propagation
vein
venom
venomous
vent
ventral fin
vertebra
vertebrate
vessel
villus
vine
viral
virus
voluntary
warm-blooded
weaverbird
wilt
wind pollination
woody
worm
X-chromosome
xylem
Y-chromosome
yolk
zoologist
zoology
zygote