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| In mammals, the part of the body containing most of the viscera except for the heart and lungs. |
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| Growth-inhibiting plant hormone; frequently antagonizes other plant growth hormones such as auxins or gibberellins by inhibiting nucleic acids and protein synthesis |
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| Base of leaf stalk in woody plants where the parenchyma cells become separated from each other because of disappearance of the middle lamella prior to leaf fall. |
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| A special structure, physiological process, or behavior that makes an organism more fit to survive and reproduce. |
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| A neurohumor, secreted by neurons |
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| An enzyme that catalyzes the converion of citric acid to cisaconitic acid and isocitric acid during the Kerbs cycle. |
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| The forwars tip of an animal sperm. Contains enzyme that allows sperm cell to enter the egg cell. |
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| The forwars tip of an animal sperm. Contains enzyme that allows sperm cell to enter the egg cell. |
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| One of the two major proteins of muscle. |
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| The locus on the surface of an enzyme where the substrate adheres and where catalysis occurs. |
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| The movement of a substance across the cell membrane against a concentration gradient, that is, from a region of low concentration to a region of high concentration and involves the expenditure of energy. |
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| The evolutionary division of a single species into several species adapted to divergent forms of life. |
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| Referring to a leaf surface, facing the stem |
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| Adenosine triphosphate (ATP) |
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| A triply phosohorylated organic compound that serves as an energy bank for cells. |
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| Referring to a motor nerve fiber that secretes adrenaline (epinephrine) and moradrenaline (norepinephrine). |
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| Nerve cells that carry impulses to the central nervous system |
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| A specialized cell layer just between the seed coat and the endosperm in grass seeds, synthesizing hydrolytic enzymes stimulated by gibberellin. |
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| A wide range of photosynthetic plants belonging to several phyla. Most live in the water; most are unicellular, but some are multicellular. |
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| One forem of a gene, different from other forms or alleles of the same gene. |
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| Speciation brought about when an ancestral population becomes separated by a geographical barrier. |
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Andy one of a large number of differefnt animal-like protists belonging to the subphylum (of Protozoa) Sarcodina, characterized by its ability to change shape frequently through the extension of cytoplasm called pseudopodia.
The stage in cell division at which the separation of homologous chromosomes occurs. Anaphase lasts from the moment of first separation to the time at which the chromosomes move to the poles.
Flowering plants; seeds contained in a ovary.
A negatively charged ion whihch moves toward the positive electrode (anode).
Toward the front end, toward the head end
The pollen bearing portion of the stamen of a flower
A triplet of nucleotides in transfer RNA that is able to pair with a complementary triplet in messenger RNA (a codon), thus arranging transfer RNA to the proper site on messenger RNA.
A form of reproduction, such as budding or binary fission, that does not involve the fusion of gametes.
The enzyme that makes possible the synthesis of ATP from ADP and inorganic phosphate in mitochondria and chloroplasts. |
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