Question 2: The embryo of broad bean seed is composed of (), () and (). Broad bean is composed of (seed coat) and (embryo). Embryo includes (radicle), (embryo) and (cotyledon composition).
question 3: how many parts does broad bean seed consist of? What are the differences? The seeds mentioned here should refer to the seeds of angiosperms. Angiosperms are generally double fertilized (fertilized egg and fertilized polar nucleus), fertilized egg develops into embryo, and fertilized polar nucleus develops into endosperm.
In the late stage of seed formation, the endosperm nutrition of some plants (such as Vicia faba of dicotyledonous plants) is absorbed by the cotyledons and degenerates, so Vicia faba seeds only have seed coat and embryo.
whereas monocotyledonous maize seeds have seed coat, embryo and endosperm.
Question 4: What and what are the two parts of broad bean seeds in the third grade of science in primary school? Broad bean seeds consist of seed coat and embryo.
question 5: what are the seeds of broad beans made of? Broad bean seeds are composed of seed coat, cotyledon, germ and radicle. The structure of broad bean seeds Broad bean is a relatively large seed with a solid seed coat outside. Peeling off the seed coat, there are a pair of thick watercress, called cotyledons, which are rich in nutrients for the growth of seedlings when seeds germinate. At the base of the two cotyledons, there is a small bud called germ. The outer end of the germ is followed by a curved part, like a small tail, which is called the radicle. When the broad bean germinates, the radicle first breaks through the seed coat and goes down into the soil to fix the position. Then the germ emerged from the middle of the two cotyledons, exposed above, and became a tender bean seedling, but the cotyledons remained in the soil until the nutrients were consumed. Generally speaking, a broad bean seed is composed of seed coat, cotyledon, germ and radicle.
Question 6: What are the broad bean seeds made of and what are they made of? The seeds mentioned here should refer to the seeds of angiosperms. Angiosperms are generally double fertilized (fertilized egg and fertilized polar nucleus), fertilized egg develops into embryo, and fertilized polar nucleus develops into endosperm.
In the late stage of seed formation, the endosperm nutrition of some plants (such as Vicia faba of dicotyledonous plants) is absorbed by the cotyledons and degenerates, so Vicia faba seeds only have seed coat and embryo.
whereas monocotyledonous maize seeds have seed coat, embryo and endosperm.
Question 7: The figure shows the outline and structure of broad bean seeds. The following statements are correct: (a) The broad bean seeds are composed of seed coat and embryo. B) As shown in the figure, the main structure of broad bean seeds includes seed coat and embryo. The embryo includes: embryo, hypocotyl, radicle and cotyledon. The embryo develops into stem and leaf, the radicle develops into root, and the hypocotyl develops into the part connecting the root and stem. Two cotyledons of dicotyl seeds are the seeds for germination.