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BIOLOGY terms that start with "A"

Across
Special structure at the tip of a sperm's head
Atom with a negative charge
Flowering plant
A 3-base sequence in tRNA
Connective tissue consisting mainly of fat cells
Secondary metabolites of plants that have pronounced physiological effects on humans; include caffeine and nicotine
Condition marked by an abnormally low number of red blood cells or of hemoglobin in the blood
Site of gas exchange in the lungs
Class of fungi
Plant stress hormone
Interaction between species where one is harmed and the other unaffected
A non-essential amino acid
Chromosome in which centromere is near one end
Splicing of pre-mRNA in more than one way to produce two or more different polypeptides
Down
Mitotic stage in which chromatids separate
Programmed cell death
Segmented worm
Change in chromosome number that is not an exact multiple of a set
Group of muscles that produces oppositely directed movements at joints
Behavior that appears to benefit other at a cost of one's self
Type of speciation where a population becomes geographically isolated
Cavity in animal embryo that becomes the organism's digestive tract
Steroid hormone made by adrenal glands; regulates salt and water balance in vertebrates
Molecule with both hydrophilic and hydrophobic regions
Sum of protons
Structures resulting from convergent evolution
Large blood vessel that exists a vertebrate heart and leads to systemic circulation
Foreign molecule that triggers a specific immune response
Cytoskeletal protein
Reduction in the size of a structure