Reproduction and Development
... • Ovum is surrounded by a dense protective layer that contains receptor sites to which sperm bind – Binding causes a vesicle in the sperm head to rupture and release enzymes that break down the protective layer and form a pathway through which the sperm nucleus can reach the ovum • Cell membrane of ...
... • Ovum is surrounded by a dense protective layer that contains receptor sites to which sperm bind – Binding causes a vesicle in the sperm head to rupture and release enzymes that break down the protective layer and form a pathway through which the sperm nucleus can reach the ovum • Cell membrane of ...
Exam 3 Answers
... Fleshly ♀ Cone, Simple ♂ Cone Cones Simple Male Leaves bunched into Mistaken for Palm One species left in Facicles trees this phylum ...
... Fleshly ♀ Cone, Simple ♂ Cone Cones Simple Male Leaves bunched into Mistaken for Palm One species left in Facicles trees this phylum ...
Lab 5: Plants: Nontracheophytes and Seedless Vascular Plants Part 2
... Plants are generally defined as multicellular, photosynthetic eukaryotes. Plant cells have cell walls composed of cellulose, and store surplus carbohydrates as starch. They utilize two photosystems in photosynthesis with two forms of chlorophyll (a and b). This list of characteristics is not mutuall ...
... Plants are generally defined as multicellular, photosynthetic eukaryotes. Plant cells have cell walls composed of cellulose, and store surplus carbohydrates as starch. They utilize two photosystems in photosynthesis with two forms of chlorophyll (a and b). This list of characteristics is not mutuall ...
The plant kingdom is in the domain Eukarya and in the supergroup
... never leaves the sporophyte. The ovule eventually becomes the seed once the egg of the female gametophyte is fertilized. Note-sperm cells are not released into the environment like seedless plants. The entire male gametophyte is used to deliver the sperm cells. Seeds and pollen eliminates the necess ...
... never leaves the sporophyte. The ovule eventually becomes the seed once the egg of the female gametophyte is fertilized. Note-sperm cells are not released into the environment like seedless plants. The entire male gametophyte is used to deliver the sperm cells. Seeds and pollen eliminates the necess ...
Angiosperms - flowering plants
... Four microspores result from each division- these are Haploid (1n). Tapetum – nutritive tissue (also lays down the sporopollenin walls) ...
... Four microspores result from each division- these are Haploid (1n). Tapetum – nutritive tissue (also lays down the sporopollenin walls) ...
Slide 1
... meiosis to produce four haploid microspores, each of which develops into a pollen grain. 3 A pollen grain becomes a mature male gametophyte when its generative nucleus divides and forms two sperm. This usually occurs after a pollen grain lands on the stigma of a carpel and the pollen tube begins to ...
... meiosis to produce four haploid microspores, each of which develops into a pollen grain. 3 A pollen grain becomes a mature male gametophyte when its generative nucleus divides and forms two sperm. This usually occurs after a pollen grain lands on the stigma of a carpel and the pollen tube begins to ...
Bryophytes and Ferns
... 11. The conspicuous part of a fern plant is a _____. a. haploid gametophyte b. diploid gametophyte c. diploid sorus d. diploid sporophyte e. haploid sporophyte 12. In the life cycle of a fern, the multicellular male gametangium (the sex organ that produces sperm cells) is called a(n) _____. a. anthe ...
... 11. The conspicuous part of a fern plant is a _____. a. haploid gametophyte b. diploid gametophyte c. diploid sorus d. diploid sporophyte e. haploid sporophyte 12. In the life cycle of a fern, the multicellular male gametangium (the sex organ that produces sperm cells) is called a(n) _____. a. anthe ...
- ISpatula
... Q14.In a typical conifer, how long does it take for fertilization to occur after pollination? ( Concept 30.2) ...
... Q14.In a typical conifer, how long does it take for fertilization to occur after pollination? ( Concept 30.2) ...
Chapter-21
... A gamete-producing stage dominates their life cycle, and sperm reach the eggs by swimming through droplets or films of water ...
... A gamete-producing stage dominates their life cycle, and sperm reach the eggs by swimming through droplets or films of water ...
The Seed Plants - FacultyWeb Support Center
... Pollen released from the pollen sacs may be carried by wind, water and animals (insects, bats, humans and birds) to the stigma of the same or neighboring flower. The transfer of pollen from the anther to the stigma is pollination. Once pollination has occurred, the pollen grain germinates with the t ...
... Pollen released from the pollen sacs may be carried by wind, water and animals (insects, bats, humans and birds) to the stigma of the same or neighboring flower. The transfer of pollen from the anther to the stigma is pollination. Once pollination has occurred, the pollen grain germinates with the t ...
exam 4 practice questions
... 25. Ovules (inside the ovaries) are MATURE/ IMMATURE seeds. Seeds are MATURE/ IMMATURE ovules. 26. While one of the two sperm in a mature gametophyte fertilizes the egg, the other fuses with the ________ to form a triploid cell. This cell within the ovary develops into the _______ for the embryo. a. ...
... 25. Ovules (inside the ovaries) are MATURE/ IMMATURE seeds. Seeds are MATURE/ IMMATURE ovules. 26. While one of the two sperm in a mature gametophyte fertilizes the egg, the other fuses with the ________ to form a triploid cell. This cell within the ovary develops into the _______ for the embryo. a. ...
Seed - DavisonScience
... – This fertilizes the egg – Embryo -> seed -> fruit containing seed – The fruit disperses seeds which germinate and ...
... – This fertilizes the egg – Embryo -> seed -> fruit containing seed – The fruit disperses seeds which germinate and ...
Sexual Selection
... Sexual Selection is based on variance in mating success. To demonstrate sexual selection requires that Variance in the trait leads to Variance in mating success due to competition among rivals, mate choice, ...
... Sexual Selection is based on variance in mating success. To demonstrate sexual selection requires that Variance in the trait leads to Variance in mating success due to competition among rivals, mate choice, ...
Asexual vs. Sexual Reproduction
... moist so that the egg is penetrable and the sperm can swim to it. An external fertilization pattern occurs when the gametes (sex cells) meet outside the bodies of both parents. To keep the sperm and egg moist it must occur in an aquatic environment. Internal fertilization occurs inside the female bo ...
... moist so that the egg is penetrable and the sperm can swim to it. An external fertilization pattern occurs when the gametes (sex cells) meet outside the bodies of both parents. To keep the sperm and egg moist it must occur in an aquatic environment. Internal fertilization occurs inside the female bo ...
Plant Reproduction
... Female gametes form in ovules • A mass of tissue (ovule) grows in an ovary • One cell undergoes meiosis, forming four haploid megaspores, three of which disintegrate • One megaspore undergoes mitosis to form the female gametophyte, which contains one haploid egg, five other haploid cells, and one ...
... Female gametes form in ovules • A mass of tissue (ovule) grows in an ovary • One cell undergoes meiosis, forming four haploid megaspores, three of which disintegrate • One megaspore undergoes mitosis to form the female gametophyte, which contains one haploid egg, five other haploid cells, and one ...
StudentInstrSht-AsexvsSexRepro
... moist so that the egg is penetrable and the sperm can swim to it. An external fertilization pattern occurs when the gametes (sex cells) meet outside the bodies of both parents. To keep the sperm and egg moist it must occur in an aquatic environment. Internal fertilization occurs inside the female bo ...
... moist so that the egg is penetrable and the sperm can swim to it. An external fertilization pattern occurs when the gametes (sex cells) meet outside the bodies of both parents. To keep the sperm and egg moist it must occur in an aquatic environment. Internal fertilization occurs inside the female bo ...
PLANTS review Chapter 29, 30, & 35-39
... monoecious Tell what happens to the 2 sperm nuclei in double fertilization One sperm fertilizes the egg and becomes the embryo; the 2nd sperm nuclei fertilizes 2 polar bodies and becomes the endosperm ...
... monoecious Tell what happens to the 2 sperm nuclei in double fertilization One sperm fertilizes the egg and becomes the embryo; the 2nd sperm nuclei fertilizes 2 polar bodies and becomes the endosperm ...
CHAPTER 30 THE PROTISTS
... 8. Sperm is delivered to an egg through a pollen tube; no external water is required for fertilization. 9. The whole male gametophyte, rather than just the sperm, moves to the female gametophyte. 10. A female gametophyte develops within an ovule which, after fertilization, becomes an embryonic plant ...
... 8. Sperm is delivered to an egg through a pollen tube; no external water is required for fertilization. 9. The whole male gametophyte, rather than just the sperm, moves to the female gametophyte. 10. A female gametophyte develops within an ovule which, after fertilization, becomes an embryonic plant ...
seed - Knox
... Fruit – mature ovary of a flower, thickens around seeds - may include some additional tissues as well - protects seeds & often enhances dispersal - may be fleshy or dry ...
... Fruit – mature ovary of a flower, thickens around seeds - may include some additional tissues as well - protects seeds & often enhances dispersal - may be fleshy or dry ...
Sexual reproduction in Human beings
... remain thick and soft and to become well supplied with blood vessels. This is important for preparation of the implantation of embryo. ...
... remain thick and soft and to become well supplied with blood vessels. This is important for preparation of the implantation of embryo. ...
Plant Anatomy: Intro to Plant Reproduction
... Haplontic life cycle (haploid dominant or zygotic meiosis) The only diploid cell Is the zygote ...
... Haplontic life cycle (haploid dominant or zygotic meiosis) The only diploid cell Is the zygote ...
Green plant diversity
... Haplontic life cycle (haploid dominant or zygotic meiosis) The only diploid cell Is the zygote ...
... Haplontic life cycle (haploid dominant or zygotic meiosis) The only diploid cell Is the zygote ...
Reproduction_animal_HKDSE_common misconception
... • However, unlike cross-fertilisation, selffertilisation involves only one parent. Therefore the genetic variation of the offspring is less than that from cross fertilisation in which genes from two different parents are combined. ...
... • However, unlike cross-fertilisation, selffertilisation involves only one parent. Therefore the genetic variation of the offspring is less than that from cross fertilisation in which genes from two different parents are combined. ...
Plant Practice Test
... process outside the body. C. Larger nutrient molecules are absorbed through the animal cell membrane than through fungal cell membranes. D. A fungus will digest nutrient matter outside of its body. E. Under certain conditions, fungi can produce their own nutrients. ...
... process outside the body. C. Larger nutrient molecules are absorbed through the animal cell membrane than through fungal cell membranes. D. A fungus will digest nutrient matter outside of its body. E. Under certain conditions, fungi can produce their own nutrients. ...
Seed - SCIS Teachers
... The ovule develops into a seed • After fertilization, the ovule, containing the triploid central cell and the diploid zygote, begins developing into a seed. • The seed contains proteins, oils, and starches. • The zygote first divides by mitosis to produce two ...
... The ovule develops into a seed • After fertilization, the ovule, containing the triploid central cell and the diploid zygote, begins developing into a seed. • The seed contains proteins, oils, and starches. • The zygote first divides by mitosis to produce two ...
Fertilisation
Fertilisation (also known as conception, fecundation and syngamy) is the fusion of gametes to initiate the development of a new individual organism. In animals, the process involves the fusion of an ovum with a sperm, which first creates a zygote and then leads to the development of an embryo. Depending on the animal species, the process can occur within the body of the female in internal fertilisation, or outside (external fertilisation). The cycle of fertilisation and development of new individuals is called sexual reproduction.