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What is 1 + 3?
Flowering plant whose seed are enclosed in a fruit and are the most complex and highley adaptable plants on earth.
Chemical produced by the liver and stored in the gallbladder that breaks fat into small droplets.
Involunary straited muscle that is only found in the heart and conducts elerical impulses that produce rhythmic contractions.
In seed, the period of inactivity allowing then to survive conditions unfavorable for growth.
Animal with a body temperature regulater by its environment (example: fish, amphibians, reptiles)
Lightweight, external covering of birds, used for flight and insulation.
iron-containing molecule of red blood cells that transport oxygen and some carbon dioxide.
Fluid-filled canals along sides of fish that serve as sensory receptors, enabling detection of prey and navigation in the dark.
Cell pigment formed by the inner epidermal skin layer; colors the skin and helps prtect against ultroviolet radiation.
Gland that produces both hormones and digestive enzymes, pancreatic juice is alkaline which stops further digestive action of pepsin.
mammal that carries its young inside the uterus untill ready for birth.
Leaf-like structures at the base of a flower, protects the flower while in the bud.
In flowers, the male reproductive structure consisting of an anther and attaching hilament.
Produces thyroxin a hormonme that regulates metabolsim and growth and calcitonin a hormone that regulate calciuim and phosphate levels.
Irreversible, responsive movement in plants toward or away from such external stinuli as light or gravity.
Large blood vessels that return blood from the tissues back to the heart, contain one-way valves to prevent backflow of blood.
Muscle whose contractions are under consious conrtol (example: Skeletal muscle)