2020-05-29

The technology that uses plants to breakdown or concentrate toxic wastes in the soil is called: They have flagellated sperm that need water to swim to the egg.

Phylogenetic tree showing the hypothesized relationships among the lineages of land plants. The … The sperm of seed plants lack flagella and do not require a film of water, as they rely on the pollen tube to reach the egg cell of the female gametophyte within the ovule. The sperm of some gymnosperm species retain the ancestral flagellated condition, providing evidence of this evolutionary transition. xxxb. Flagellated sperm only swim internally. c.

Flagellated sperm in plants

c. Pollen grains in some rare taxa are flagellated. d. Both gametes of many gymnosperms are flagellated, but the flagella of the female gamete are only sufficent to propel the gamete from the archegonium. The conifers and Gnetales lack flagellated sperm, so answer a is incorrect. nonvascular plants have flagellated sperm that swim and that flowering plants have sporangia, microspore, and megaspore.

Both seeds and pollen distinguish seed plants from seedless vascular plants. These innovative structures allowed seed plants to reduce or eliminate their dependence on water for gamete fertilization and development of the embryo, and to conquer dry land. Pollen grains are male gametophytes, which contain the sperm (gametes) of the plant.

xxxb. Flagellated sperm only swim internally. c.

Their sperm and eggs require water for mating: the gametes are not protected from desiccation, and the flagellated sperm must swim in water to find the egg. major adaptations compared to nonvascular plants: true roots and vascular tissue.

Angiosperms 4.

Some plant species, however, produce flagellated sperm that can swim through water to reach the egg. Consequently, plant cells typically lack flagella, although plant sperm cells are flagellated. In seed plants, the use of resistant, far-traveling, airborne pollen to bring gametes together is a terrestrial adaptation. In bryophytes and pteridophytes, flagellated sperm must swim through a film of water to reach eggs cells in archegonia. The evolution of pollen in seed plants led to even greater success and diversity of plants on land.
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Alla hittills kända gymnosperm, utrotade eller moderna är träiga växter, träd resultat av meios); de kan ha flagella för rörelse (i alger) eller spridas med vind Det är uppdelat i underriker: Crimson, Real alger, Higher plants.

2 and 3. The major difference between angiosperms and gymnosperms comes from the _____. presence or absence of a protective covering over the ovu. Angiosperms are different from all other plants because only they have _____. flowers. Unlike most angiosperms, grasses are The egg and sperm continue to mature, the nucleus of the latter undergoing additional divisions resulting in two male gametes, or sperm.

Why is the presence of flagellated sperm in cycads surprising? Cycads: Cycads belong to a group of plants called gymnosperms which develop seeds, but not flowers or fruit.

flowers.

The other options can be put apart because multicellularity, sexual reproduction, and flagellated sperm are also characteristics that are present in plants, for example. Heterotrophic nutrition is something that's part of all animals as well as non green plants. Second question: a. M ulticellularity the sperm are flagellated, but archegonia and antheridia are at or below ground level and generally very close together. Some gymnosperms retain sperm motility, but swimming is internal.