(2) After pollination and fertilization, the ovary develops to fruiting, and the ovule develops into seed. The fruit of rape is silique, which contains many seeds. This is because there are many ovules in the ovary of each rape flower, and the nutrients of dicotyledonous seeds are stored in cotyledons. Rapeseed belongs to dicotyledonous plants, and rapeseed oil mainly comes from cotyledons in seeds.
(3) Rape is rich in vitamin C, and the available reagent is potassium permanganate solution. The experimental process can be divided into three basic steps: grinding, filtering and titration.
(4) Bees are completely metamorphosed insects, and their development process goes through stages such as fertilized eggs, larvae, pupae and adults. Bees belong to arthropods, which are characterized by many segments, exoskeleton, segmented feet and tentacles.
So, the answer is: (1) Action; Large flower shape, beautiful corolla color, fragrant smell and sweet nectar; Temperature;
(2) Multiple ovules; Cotyledon;
(3) potassium permanganate solution; Grinding, filtering and titration;
(4) The body is composed of many segments, and it is divided. There is an exoskeleton on the body surface, and the feet and tentacles are also divided;