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在运动中起‘支点’作用的结构是？The structure that acts as a fulcrum in motion is
joint
卷发与黑发是相对性状吗？Are curly hair and black hair relative traits
NO
在运动中起’杠杆‘作用的结构是？The structure that leverages in motion is？
bone
控制生物性状的基本单位是 The basic unit for controlling biological traits is
Gene
常晒太阳，皮肤变黑。这个变异可以遗传吗？Frequent exposure to the sun darkens the skin. Is the VARIATION heritable?
NO
草履虫和蝙蝠的主要运动方式分别是 The main modes of locomotion of paramecium and bat are
游泳、飞行 swim, fly
关节面表面覆盖的_______很光滑，能缓冲骨与骨之间的撞击和摩擦 The surface of the articular surface is covered by _______
软骨cartilage
构成其个体的结构层次是？What is the level of organisation of organisims?
cell-tissue-organ-organ system- organisms
关节囊分泌的______使关节更加灵活。______ secreted by the joint capsule makes the joint more flexible
滑液synovia
生物的性状传给后代的现象称为 ______。biological traits are passed on to offspring is called ______ .
Inheritance
说出一对相对性状 Name a pair of relative traits
单眼皮和双眼皮；有耳垂和无耳垂；能卷舌和不能卷舌 Single and double eyelids; With and without earlobes; Can roll tongue and can't roll tongue
在遗传学上，生物个体的基因组成，叫做这个个体的 ____；
基因组 genome
性状表现是由_____和______共同作用的结果。The phenotype is the result of a combination of _____ and ______
遗传物质和环境 Genetic material and environment
成人骨骼无机物含量是？Adult bone mineral content is？
2/3
运动系统由什么组成？What does the motor system consist of
bone, skeletal muscle, joint
用手臂敬礼时，相关肌肉的运动情况是（ ）When saluting with the arm, the movement of relevant muscles is
肱二头肌收缩，肱三头肌舒张 biceps contract, triceps relax
老年人跌倒后易骨折，原因是老年人骨的成分中The elderly fall after fracture easily, the reason is the composition of the bones of the elderly
无机物增多，弹性变小The increase of inorganic material makes the elasticity decrease
将一根牛的腿骨纵剖开，观察到骨松质内和骨髓腔内的骨髓均为红色， 这只牛是The leg bone of a cow was dissected longitudinally, and the bone marrow in the bone and bone marrow was observed to be red. The cow is adult or calf
小牛犊 calf
人体中最大的“钙库”是The largest reservoir of calcium in the body is
bone
关节包括哪三个部分？What are the three parts of a joint
关节囊、关节腔、关节面 Joint capsule, joint cavity, joint surface
人的生殖细胞、体细胞、受精卵中染色体的数目分别为The number of chromosomes in the zygote of human germ cell is respectively
23条、46条、46条
成年人具有造血功能的红骨髓主要存在于 Hematopoietic red bone marrow is mainly found in adults
骨松质 spongy bone
青少年骨的特点是 The characteristics of juvenile bone are
弹性大，硬度小，容易变形 High elasticity, low hardness, easy deformation
A． 每条DNA分子上会有很多个基因 There are many genes per DNA molecule
B． 基因是具有遗传效应的DNA片段 A gene is a piece of DNA that has a genetic effect
C． 每条染色体上会有很多个蛋白质分子 There are many protein molecules on each chromosome
D． 每条染色体上会有很多个DNA分子 There are many MOLECULES of DNA on each chromosome
which one is not correct?
D
长骨的结构包括 The structures of long bones include
骨膜、骨质、骨髓 Periosteum, sclerotin, bone marrow