taste buds(味蕾)
Structures on the tongue that contain chemoreceptors, which respond to four main sensations—sour, salty, bitter, and sweet—to create the sense of taste.
Taxonomy(分类法)
The study of biological classification.
Telophase(末期)
The final stage of mitosis before cytokinesis. In telophase, the nuclear envelope re-forms around separated sister chromatids and kinetochore microtubules disappear. Cell elongation also occurs during this phase. The final stage of the first meiotic division (meiosis I), during which chromosomes arrive at the poles of the cell and begin to recondense; the final stage of the second meiotic division (meiosis II), during which chromosomes arrive at the poles of the cell, the nuclear envelope begins to re-form, and the chromosomes begin to recondense.
Tendon(腱)
Connective tissue between bones and muscles.
Testes(睾丸)
The male gonads; sperm and testosterone are produced here.
Testosterone(睾酮)
A hormone necessary for sperm production in men. Also responsible for developing and maintaining the secondary sex characteristics of males, starting at puberty.
Thyroid(甲状腺)
Gland that produces the hormone thyroxine, which increases the metabolism of most of the cells in the body. Located in the neck.
Tissue(组织)
A group of closely connected and similar cells that cooperate to generate a specific structure or specialized function within an organism.
Tracheophyte(维管植物)
A terrestrial plant with a vascular system.
Trait(特征)
Any observable feature or characteristic of an organism.
transfer RNA (Trna/翻译RNA)
An RNA molecule used in protein synthesis as a link helping to convert messenger RNA into amino acids.
Transpiration(蒸发作用)
The process by which a plant loses water to its environment through evaporation.
trophic level(营养级)
Steps on a food/biomass pyramid that are defined by organisms within a community that are the same distance from the primary producers in a food web.
Tropism(向性)
Long-term growth of a plant toward or away from a stimulus.
Tuber(块茎)
Fleshy underground storage structure composed of an enlarged portion of the stem that has on its surface buds capable of producing new plants.
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