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In our city, there is a big zoo. There are a lot of different animals in it. There are some scary(吓人的) tigers and lions. They like eating meat and they eat much meat every day.
There are also two big elephants and a baby(幼崽) one. Children like to ride one of them. The elephants are very kind and friendly. They eat much grass and bananas.
In the zoo, we can see different kinds of bears(熊): brown bears, black bears and white bears. They are all shy and clumsy(笨拙的). They stand on their back legs and lift their front legs to ask for food They like cakes very much.
Do you like pandas? There's only one in the zoo. Her name is Lingling. She is very cute. She likes eating bamboos a lot. She is kind of shy, She's very interesting and lovely.

图甲是采用黑、白瓶法（黑瓶不透光），分别测定某池塘夏季白天不同深度水层每小时的平均氧浓度变化曲线，纵轴表示水池深度（假定不同深度的水温不变），横轴表示瓶中O₂的变化量（g/m²•h）；图乙是某同学“探究影响植物光合速率的因素”的实验装置图．请回答下列问题：

（1）水深3m时白瓶中的水藻____ （能/不能）进行光合作用，此时水藻产生ATP的结构有____ ．

（2）白瓶中测得的O₂变化量为净光合作用产生量，则光照适宜时，水深1m处每平方米的水藻1小时制造的O₂的总量为____ ．

（3）白瓶在水深3m时，O₂的变化量为0，表明在此深度时，水藻的光合速率____ （填大于、等于、小于）呼吸速率，若将白瓶水藻从3m处移到2m处，则短时间内水藻细胞中C₅的含量将____ （填增大、减小、不变）．

（4）若图乙实验中将试管向右移，随着距离的增加，气泡产生速率下降，产生这一结果的主要原因是____ ．