A a(n)- A (aminoacyl) site A-factor A form DNA A-protein (A+T)/(G+C) ratio ab- abaxial ABC proteins abdomen abiotic abiotic factors abiotic stress ablation aboral end abortion abortive transduction abscisic acid abscission zone absolute age absolute zero absorbance optics absorptive endocytosis abyssal zone abzyme Ac/Ds acaricide accelerated run acceptor acceptor arm acceptor end acceptor stem accessory pigment accommodation accuracy acellular acellular vaccine acentric chromosome acentric fragment acervulus acesulfames acetaminophen acetic acid acetyl group acetylcholine acetylcholine receptor channel acetylcholinesterase acetylsalicylic acid achaete-scute complex achene acid acid-base reaction acid phosphatase acid rain acidic oxide acidosis acoelomate acne acrocentric acrosomal vesicle acrosome actin action potential activation energy Activator and Dissociation active immunity active site active transport acute acyl acyl-CoA acyl-CoA synthetase ad- ADA adaptation adaptive landscape adaptive peak adaptive radiation adaptive surface adaptive value Additive genetic effects additive genetic variance additive model adenine adenosine adenosine deaminase deficiency (ADA) adenosine diphosphate adenosine triphosphate Adenovirus adhesion adipocyte adipose tissue adjacent segragation adjacent-1 segregation adjacent-2 segregation ADP adrenal cortex adrenal glands adrenal medulla adrenaline adrenergic adrenocorticotropic hormone adult form adult-onset adventitious root aerobic respiration affected affected relative pair afferent arteriole AFLP agar age structure agglutination aggregate aggregation technique aggresome agonist AIDS-related complex Ala Alagille Syndrome Alanine albino albumen alcoholic fermentation aldosterone algae alkali metal alkaline earth metal alkaline phosphatase alkalosis alkanoyl alkylating agent allantois allele allele frequency allele specific hybridization Allele specific polymerase chain reaction (AS-PCR) allelic exclusion allergy mediator allo- allogeneic allometric growth allometry allopatric speciation allopolyploid allosteric (change) allosteric protein allosteric transition allotype alloy allozygosity allozyme alpha-fetoprotein alpha helix alpha-linolenic acid alphamethylstyrene (AMS) ALS altered altered specificity alternate segregation alternation of generations alternative splicing altruism Alu family alveolar duct alveoli Alzheimer’s Disease amber codon amber suppressor ambi- Ames test amino acid amino group aminoacyl-tRNA aminoacyl-tRNA synthetase aminoglycosides aminotransferase ammonia amniocentesis amniography amnion amniote amniotic fluid amniotic membrane amoebocyte amorph AMP amphetamine amphi- amphidiploid amphimixis amphipathic amphoteric amplexus amplicon amplification of DNA Amplified Fragment Length Polymorphism ampulla ampullae amu amygdala amylase amyloid Amyotrophic Lateral Sclerosis anabolic anabolism anaerobe anaerobic respiration anagenesis analog analogous structure analyte analytical chemistry anaphase anaphase I anaphase II anatomy androecium androgen receptor anemia anencephaly aneuploid aneuploidy angel dust angiosperm Angstrom animal breeding animal model Animalia anion anlage annelid annealing annotation anode antagonist antagonistic muscles anterior horn anther antheridia anthocyanin anti- anti-inflammatory cytokines anti-hypertensive drugs anti-tumor drug anti-oncogene antiarrhythmic antiasthmatic antibiotic antibiotic resistance antibody antibody assays anticipation anticoagulant anticoding strand anticodon anticonvulsant antidiuretic hormone antigen antigen binding site antigenic determinant antigenic switching antimicrobial agent antimorph antioxidant antiparallel antisense RNA antisense strand antiterminator protein anus aorta AP-1 AP endonuclease AP site apical meristems Apogamy apolipoprotein apomixis apoptosis appendicular skeleton appendix application aqueous humor aqueous solution arachidonic acid Archaea archegonia archenteron Arg Arginine Argon Arrayed library Arrestins Arrhenius acid Arrhenius base arrow diagram ARS arteriogram arteriole artery arthritis arthro arthropod artifact artificial insemination (A.I.) artificial selection ascending limb asci ascomycete ascospore ascus -ase asexual reproduction asexual spore Asn Asparagine Asp Aspartic acid aspirin AS-PCR assembly assignment test assortative mating aster asthma astrocyte asymptomatic ataxia ataxia-telangiectasia -ate atom atomic mass atomic mass unit (amu) atomic number atomic weight ATP ATP synthase atriopore atrioventricular node atrioventricular valve atrium atrophy attached X attenuator attenuator stem auditory nerve autoantibody autocatalytic reaction autogamy autoimmune disease autoimmunity automixis autonomic nervous system autonomous replication sequence autonomous specification autopolyploid autoradiography autoregulation autosomal autosomal dominant autosomal recessive autosomal set autosome autotroph autozygosity auxin auxotroph auxotrophic mutant Avogadro's law Avogadro's number avuncular relationship axial skeleton axil axon axoneme
