1) where did pollen grains lands during pollination ? a) anther b) style c) nucleus d) stigma 2) nucleus generative will produce two sperms by a) mitosis b) meiosis c) germination d) fertilization 3) in the embryo sac, one sperm fertilizes the egg forming a) nuclei b) endosperm c) sperm d) zygote 4) endosperm..... a) provide nutrients to the developing embryo b) divide into four sperm c) develop into embryo d) fertilizes eggs 5) what is formed inside embryo sac a) sperm b) zygote c) endosperm d) egg 6) pollen grains absorb a) moisture and germinates b) germinates and liquid c) moisture and liquid d) tomato sauces 7) the union of two sperm with different nuclei of the embryo sac is known as a) single fertilization b) pollination c) food storing tissue d) double fertilization 8) the pollen tubes degenerate and discharge a) embryo sac b) electrons c) two sperm d) endosperm 9) double fertilization ensures that a) the endosperm develop only in the ovule b) sperm fertilize two polar nuclei to form a triploid c) zygote develop into embryo d) embryo achieve octet configuration 10) the endosperm is rich in a) moisture b) nutrients c) seed d) nuclei

double fertilization

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？