一种蝴蝶的体细胞中含有28对同源染色体，雌蝶体内的染色体有29种形态。蝴蝶的粉色翅和红色翅为一对相对性状，由两对独立遗传的等位基因（A、a和B、b）控制，基因与性状的关系如图所示。现有两只纯合的粉翅蝶交配，F₁中雄蝶全为粉翅，雌蝶全为红翅。请回答下列问题：

绿色植物在光下能进行的生命活动是（　　）

①光合作用

②呼吸作用

③蒸腾作用

④吸收水和无机盐．

绿色开花植物一生中每个发育阶段，都具有根、茎、叶、花、果实和种子六种器官。

根据短文内容，完成下面的表格。

Have you ever wondered what an American high school is really like? This article will describe a typical (典型的) high school and its students.

A typical American high school has several large buildings and enough space for about l, 500 students. Every student is given a locker. When students first arrive at school, they go straight to their lockers to put away or get their textbooks and to hang up their outdoor clothes. As American textbooks are expensive, students would rather loan (租借) than buy them. Students must pay back if they lose any of them.

American students have different types of school transport. They usually take a yellow school bus or walk to school if they live close enough. Sometimes their parents drive them to school. When they turn 16 years old, most take a free driving class at school for one term.  If students earn passing grades in the class and also pass their state driver's exam, they can begin driving themselves to school.

Each day, students take six or seven classes. They must take Science, Maths, English and Social Studies. They can choose Art, Homemaking, Fashion Design and other classes.  In some schools students are required to take one or more of the following special classes: Health Education, Physical Education or Foreign Language Studies. Students move to different classrooms for each subject. This is because each teacher has their own classroom.  There is a five-minute break between classes, to give the students the time to hurry to their next class.

The regular school day usually ends early in the afternoon. After school more than half of the students are involved in after-school activities. These activities include sports-especially football, basketball, baseball and soccer or clubs, such as yearbook, speech, school newspaper, photograph or student government.

某种蛙的眼色有蓝眼（A__B__）、绿眼（A__bb、aabb）、紫眼（aaB__）三种．现有蓝眼蛙与紫眼蛙交配，F₁仅有蓝眼和绿眼两种表现型，理论上F₁中蓝眼蛙和绿眼蛙的比例为（　　）