(4) Suitable temperature (1 point)? Certain amount of moisture (1 point)? Adequate air (1 point)

(5) Young roots (root hairs)? (6) buds? (7) Pollination (1 point)

(8) Pumpkin flowers are unisexual and male flowers do not bear fruit

Test Question Analysis: (1) Pumpkin is a green plant that can make its own organic matter through photosynthesis, and is a producer in the ecosystem.

(2) After the completion of the two important physiological processes of pollination and fertilization, most of the structure of the flower withers, and only the ovary continues to develop, the wall of the ovary develops into a fruit skin, the ovule develops into a seed, the bead covers develop into a seed coat, the fertilized egg develops into an embryo, and finally the ovary develops into a fruit. Thus, in the figure 1 the fruit develops from the ovary and 2 the pumpkin seed develops from the ovule in 6.

(3) Corn seed is a monocotyledon seed with one cotyledon and pumpkin seed is a dicotyledon seed with two cotyledons and no endosperm.

(4) Seed germination, in addition to the seed itself to have a sound germination force and the lifting of dormancy, but also need certain environmental conditions, mainly adequate moisture, suitable temperature and enough oxygen.

(5) The main organ of the plant that absorbs water and inorganic salts is the root. Roots suitable for water absorption is characterized by a large number of root hairs in the mature area of the root tip, greatly increasing the area of contact between the root and the water in the soil, which is conducive to water absorption. Moreover, the mature area of the root tip and part of its inner cells differentiate to form conduits, which can transport water and inorganic salts. Therefore, the main part of plant roots to absorb water is the mature area of the root tip. When transplanting eggplant seedlings, pumpkin seedlings, always keep the root of the soil pile, the purpose is to protect the young roots and root hairs, improve the plant's ability to absorb water, so as to improve the survival rate of transplanting.

(6) The seeds of pumpkin include: seed coat, radicle, germ, embryonic shoot, embryonic axis, cotyledon. The seed germinates under suitable conditions, the radicle develops into roots in the future, the germ develops into stems and leaves, the embryonic axis develops into the part connecting roots and stems, and the cotyledons store a large amount of nutrients.

(7) Pollination is the process by which mature pollen is transmitted to the pistil stigma or ovule after it is dispersed from the stamen anthers or microsporangia.

(8) Flowers can be categorized as bisexual or unisexual on the basis of the presence or absence of pistil and stamen. In a flower with both stamens and pistils is called a bisexual flower; in a flower with only pistils or only stamens is called a unisexual flower. In a unisexual flower, a flower with only pistils is called a female flower, and a flower with only stamens is called a male flower. The pumpkin is a unisexual flower, and the "lie flower" is a male flower, which has only stamens and no pistil, so it cannot bear fruit.