describe double fertilization in angiosperms. include the following points in your response. - which cell in...
describe double fertilization in angiosperms. include the following points in your response. - which cell in pollen grain produces the sperm cells? what does each sperm cell join with, and in each case what develops after the sperm cell joins with another cell or nuclei ?
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describe double fertilization in angiosperms. include the
following points in your response. - which cell in...
Question 21 Which of the following is TRUE concerning fertilization in angiosperms? O The pollen tube...
Question 21 Which of the following is TRUE concerning fertilization in angiosperms? O The pollen tube is formed by the egg moving up the stigma toward sperm O One sperm fuses with the polar nuclei to form the endosperm, which is triploid O Pollen germination occurs on the anther O A generative cellgan divide by meiosis to form four egg cells
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o complete reliance on wind as the pollinating agent O ovules that are not contained within ovaries carpels that contain microsporangia O double internal fertilization O free-living gametophytes Angiosperm double fertilization is so-called because it features the formation of two embryos from two sperm cells and two eggs. one embryo involving one sperm cell and an endosperm involving a second sperm cell. O one embryo...
b ory Marvel Observation Flowering Plant Life Cycle Use Figure 10.6 as a guide to describe...
b ory Marvel Observation Flowering Plant Life Cycle Use Figure 10.6 as a guide to describe the life cycle of flowering plants 1. The parts of the flower involved in reproduction are the and the 2. The there the top of the same has two sacs, which produce - by meiosis. 3. Within an ovule, a megaspore mother sellepoes meliosis to produce four three of which die 4. A microspore underpoes mitosis and becomes a - the male gametophyte. 5....
Plant Diversity The scales of the female cones bear ovules, which enclose the female sporangia. Cells...
Plant Diversity The scales of the female cones bear ovules, which enclose the female sporangia. Cells in the female sporangia also undergo meiosis to produce spores. One of the spores from each meiotic division develops into a female gametophyte by mitosis. As the pollen germinates and produces sperm nuclei by mitosis, the female gametophyte produces an egg. One sperm nucleus reaches the egg through the pollen tube and fertilizes it. Notice in Figure 6 that the male gametangium has been...
ws. Unless you need to edit it's safer to stay in Protected View Enable Editing Alternation...
ws. Unless you need to edit it's safer to stay in Protected View Enable Editing Alternation of generations describes plant life cycles. There are ſhow many?) generations. • The gametophyte generation begins when the process of forms (ploidy) cells. The gametophyte generation ends when a (ploidy) _ is formed by the process of_ Figure 38.4 Alternation of generations: What are the two generations in the plant life cycle? What is the male gametophyte? Female? The microsporangium in the pollen sac....
mig punis. Herbivore becomes ill or dies. Matching 2. Place the letter associated with the description...
mig punis. Herbivore becomes ill or dies. Matching 2. Place the letter associated with the description int hace the letter associated with the description in the right hand column into the space associated with the most appropriate term in the left-hand column. flavenoids infection thread fertilization tube apomixis embryo sac phytochrome aleurone scarification endosperm A) tube-like structure formed from cell of pollen grain that extends from stigma through style into ovule. B) far red receptor C) layer of cells in...
What are the answers to those questions? Which of the following is a characteristic that is...
What are the answers to those questions?
Which of the following is a characteristic that is NO shared by gymnosperms and angiosperms? A) production of the male gametophyte within the pollen grain B) a female gametophyte that is retained within sporophyte tissue C) Production of both pollen and seeds D) Production of a triploid endosperm Which of the following cells has a different ploidy level from the rest? A) root cells of a flowering plant B) zygote C) cells of...
1. How does a double positive T cell become a mature T cell? Include the selection...
1. How does a double positive T cell become a mature T cell? Include the selection process. 2. What is the effector function of CD8+T cells? How do they cooperate with CD4+ T cell effector functions? 3. What specifically drives the formation of each subset of Th effector cells? How do these Th effector cells respond once activated (i.e. what are their effector mechanisms?) 4. Describe in detail the signals in which an APC activates a T cell, and include...
Q: Males cones are called staminate cones, where on the tree are they found? Each scale...
Q: Males cones are called staminate cones, where on the tree are they found? Each scale (microsporophyll) on the staminate cone bears a microsporangium that produces pollen grains (male gametophytes) Q: What do we call the pine's male gametophytes? Procedures 30.3 & 30.4 Phylum Coniferophyta → See figures named below in parenthesis from lab book Female ovulate cones are on upper branches of pine trees; each produces megaspores that undergo mitosis into a megagametophyte which, together with its surrounding tissues,...
1. When you look at a pine or maple tree, the plant you see is a...
1. When you look at a pine or maple tree, the plant you see is a _____. 2. The Brazil nut tree, Bertholletia excels (n = 17), is native to tropical rain forests of South America. It is a hardwood tree that can grow to over 50 meters tall, is a source of high-quality lumber, and is a favorite nesting site for harpy eagles. As the rainy season ends, tough-walled fruits, each containing 8-25 seeds (Brazil nuts), fall to the...
Question 21 Which of the following is TRUE concerning fertilization in angiosperms? O The pollen tube is formed by the egg moving up the stigma toward sperm O One sperm fuses with the polar nuclei to form the endosperm, which is triploid O Pollen germination occurs on the anther O A generative cellgan divide by meiosis to form four egg cells
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o complete reliance on wind as the pollinating agent O ovules that are not contained within ovaries carpels that contain microsporangia O double internal fertilization O free-living gametophytes Angiosperm double fertilization is so-called because it features the formation of two embryos from two sperm cells and two eggs. one embryo involving one sperm cell and an endosperm involving a second sperm cell. O one embryo...
b ory Marvel Observation Flowering Plant Life Cycle Use Figure 10.6 as a guide to describe the life cycle of flowering plants 1. The parts of the flower involved in reproduction are the and the 2. The there the top of the same has two sacs, which produce - by meiosis. 3. Within an ovule, a megaspore mother sellepoes meliosis to produce four three of which die 4. A microspore underpoes mitosis and becomes a - the male gametophyte. 5....
Plant Diversity The scales of the female cones bear ovules, which enclose the female sporangia. Cells in the female sporangia also undergo meiosis to produce spores. One of the spores from each meiotic division develops into a female gametophyte by mitosis. As the pollen germinates and produces sperm nuclei by mitosis, the female gametophyte produces an egg. One sperm nucleus reaches the egg through the pollen tube and fertilizes it. Notice in Figure 6 that the male gametangium has been...
ws. Unless you need to edit it's safer to stay in Protected View Enable Editing Alternation of generations describes plant life cycles. There are ſhow many?) generations. • The gametophyte generation begins when the process of forms (ploidy) cells. The gametophyte generation ends when a (ploidy) _ is formed by the process of_ Figure 38.4 Alternation of generations: What are the two generations in the plant life cycle? What is the male gametophyte? Female? The microsporangium in the pollen sac....
mig punis. Herbivore becomes ill or dies. Matching 2. Place the letter associated with the description int hace the letter associated with the description in the right hand column into the space associated with the most appropriate term in the left-hand column. flavenoids infection thread fertilization tube apomixis embryo sac phytochrome aleurone scarification endosperm A) tube-like structure formed from cell of pollen grain that extends from stigma through style into ovule. B) far red receptor C) layer of cells in...
What are the answers to those questions?
Which of the following is a characteristic that is NO shared by gymnosperms and angiosperms? A) production of the male gametophyte within the pollen grain B) a female gametophyte that is retained within sporophyte tissue C) Production of both pollen and seeds D) Production of a triploid endosperm Which of the following cells has a different ploidy level from the rest? A) root cells of a flowering plant B) zygote C) cells of...
1. How does a double positive T cell become a mature T cell? Include the selection process. 2. What is the effector function of CD8+T cells? How do they cooperate with CD4+ T cell effector functions? 3. What specifically drives the formation of each subset of Th effector cells? How do these Th effector cells respond once activated (i.e. what are their effector mechanisms?) 4. Describe in detail the signals in which an APC activates a T cell, and include...
Q: Males cones are called staminate cones, where on the tree are they found? Each scale (microsporophyll) on the staminate cone bears a microsporangium that produces pollen grains (male gametophytes) Q: What do we call the pine's male gametophytes? Procedures 30.3 & 30.4 Phylum Coniferophyta → See figures named below in parenthesis from lab book Female ovulate cones are on upper branches of pine trees; each produces megaspores that undergo mitosis into a megagametophyte which, together with its surrounding tissues,...
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