In angiosperms (flowering plants), the sporophyte is dominant over the male and female gametophytes. The female gametophyte is the ovule, which contains 8 haploid nuclei organized into 7 cells, one of which is the egg. The male gametophyte is the pollen gr...
根据文章第四段“This tissue makes it possible for a tree to draw water from the ground and deliver it to the leaves.(这种组织使树木能够从地面吸取水分并将其输送到叶子中。)”中“draw water from the ground”可猜测,这里的it代指前面的water,即“将水分输送到叶子中”。故选C。【小题3】推理...
Describe the stages of cellular development prior to tissue stages. What is the chorioallantois membrane present in the embryonic development of reptiles and birds? How does this membrane participate in the energy metabolism of the embryo? What...
As a result, the trees that now grow there could face a serious threat.When drought strikes, trees begin to fail in the xylem(木质部), special tissue made of many tiny, strawlike tubes. This tissue makes it possible for a tree to draw water from the ground and deliver it to the ...
Which of the following is a living cell which lacks nucleus on maturity ? View Solution Which of the following glands consists of two lobes , interconnected with a thin flap of connective tissue ? View Solution Exams IIT JEE NEET UP Board ...
To solve the question regarding which part of the complex permanent tissue involved in the transport of water is different from the rest, we can follow these steps:1. Identify the Tissue: The question refers to the complex perm
What is the purpose of the cell membrane for a plant cell? In plants, the cell wall forms as a young plant cell secretes polysaccharides onto the outer surface of its plasma membrane. Being thin and pliable, this primary wall allows the cell to enlarge and cha...
A dry battery having at least one primary cell with a container electrode is enclosed in a case of synthetic plastic material. The case is clamped at the bottom portion between an 0-ring seal surrounding an extra thick portion of the bottom of the container electrode and a raised edge of ...
When drought strikes, trees begin to fail in the xylem(木质部), special tissue made of many tiny, strawlike tubes. This tissue makes it possible for a tree to draw water from the ground and deliveritto the leaves. During times of drought, tiny air bubbles can develop in the tubes. Too...
Which of the following is not the feature of gymnosperms View Solution Which of the following is not the feature of meiosis? View Solution Which one of the following is not a feature of democracy? View Solution Which of the following is not a feature of simple tissue? View Solution ...