Sc9 - a 2.2(teacher notes)
... Male gametes = sperm cells. Female gametes = egg cell. During mating, the SPERM CELL and EGG CELL unite. This creates one entity, the ZYGOTE. The zygote is the first complete cell of the individual. Each and every cell will be then be duplicated by splitting in half: the size of each cell stays the ...
... Male gametes = sperm cells. Female gametes = egg cell. During mating, the SPERM CELL and EGG CELL unite. This creates one entity, the ZYGOTE. The zygote is the first complete cell of the individual. Each and every cell will be then be duplicated by splitting in half: the size of each cell stays the ...
Asexual vs. Sexual Reproduction
... in half (Figure 1.1). First, their chromosome replicates and the cell enlarges. The cell then divides into two cells as new membranes form to separate the two cells. After cell division, the two new cells each have one identical chromosome. This simple process allows bacteria to reproduce very rapid ...
... in half (Figure 1.1). First, their chromosome replicates and the cell enlarges. The cell then divides into two cells as new membranes form to separate the two cells. After cell division, the two new cells each have one identical chromosome. This simple process allows bacteria to reproduce very rapid ...
Asexual vs. Sexual Reproduction
... in half (Figure 1.1). First, their chromosome replicates and the cell enlarges. The cell then divides into two cells as new membranes form to separate the two cells. After cell division, the two new cells each have one identical chromosome. This simple process allows bacteria to reproduce very rapid ...
... in half (Figure 1.1). First, their chromosome replicates and the cell enlarges. The cell then divides into two cells as new membranes form to separate the two cells. After cell division, the two new cells each have one identical chromosome. This simple process allows bacteria to reproduce very rapid ...
Cone Bearing Plants: Examples
... • These plants are nonvascular which means there are NO tubes to transport food and water up and down through the plant. • Thus, they DO NOT grow tall and remain small & low to the ground. • They use spores to reproduce • They DO NOT have true roots, stems or leaves • They can be found on moist rock ...
... • These plants are nonvascular which means there are NO tubes to transport food and water up and down through the plant. • Thus, they DO NOT grow tall and remain small & low to the ground. • They use spores to reproduce • They DO NOT have true roots, stems or leaves • They can be found on moist rock ...
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 ...
Coniferophyta
... •Pollination is the transfer of pollen grains from male to female gametophytes or from micro- to macro-sporangium. This process facilitates contact between male gametes and the female ovum, leading to fertilization, development of seed, and thence a new plant. Gymnosperms have anemophilous pollinati ...
... •Pollination is the transfer of pollen grains from male to female gametophytes or from micro- to macro-sporangium. This process facilitates contact between male gametes and the female ovum, leading to fertilization, development of seed, and thence a new plant. Gymnosperms have anemophilous pollinati ...
Development Reading Guide File
... Fertilization occurs when the egg and sperm cells fuse. Within the ovum (or egg), the nuclei of the sperm and ovum fuse, forming a diploid nucleus. This fertilized egg cell is called a zygote. Successful fertilization requires living sperm in the oviduct on the day of, or shortly after, ovulation. O ...
... Fertilization occurs when the egg and sperm cells fuse. Within the ovum (or egg), the nuclei of the sperm and ovum fuse, forming a diploid nucleus. This fertilized egg cell is called a zygote. Successful fertilization requires living sperm in the oviduct on the day of, or shortly after, ovulation. O ...
Review Questions for Exam 2
... 6. Sketch the lifecycle of a gymnosperm and label with the following terms: sporophyte, staminate or pollen (male) cone, microsporangium, microsporocyte, microspore, male gametophyte, sperm, pollen, ovulate (female) cone, megasporangium, megasporocyte, megaspore, ovule, female gametophyte, egg, zygo ...
... 6. Sketch the lifecycle of a gymnosperm and label with the following terms: sporophyte, staminate or pollen (male) cone, microsporangium, microsporocyte, microspore, male gametophyte, sperm, pollen, ovulate (female) cone, megasporangium, megasporocyte, megaspore, ovule, female gametophyte, egg, zygo ...
PBIO 115: Fall 2011 Lab 7: Flowers and the Flowering Plant Life Cycle
... The angiosperm life cycle is basically similar to that of other seed plants (i.e., sporic, heterosporous, seedproducing), but the gametophytes are even more reduced. The mature megagametophyte usually consists of only seven cells and the microgametopyte of only three. Neither archegonia nor antherid ...
... The angiosperm life cycle is basically similar to that of other seed plants (i.e., sporic, heterosporous, seedproducing), but the gametophytes are even more reduced. The mature megagametophyte usually consists of only seven cells and the microgametopyte of only three. Neither archegonia nor antherid ...
Junior Inter Botony Questions English Medium
... ★ The sepals, petals and stamens of the flower wither and fall off. 14. Distinguish between asexual and sexual reproduction. Why vegetative reproduction is also considered as a type of asexual reproduction? ...
... ★ The sepals, petals and stamens of the flower wither and fall off. 14. Distinguish between asexual and sexual reproduction. Why vegetative reproduction is also considered as a type of asexual reproduction? ...
Topic: Reproduction
... nutrients, gases and wastes takes place in the (1) umbilical cord (2) placenta (3) amniotic fluid (4) vagina ...
... nutrients, gases and wastes takes place in the (1) umbilical cord (2) placenta (3) amniotic fluid (4) vagina ...
Pine seed - Cloudfront.net
... Pollen grain burrows into ovule Cell undergoes meiosis to make 4 haploid megaspores; one survives and grows into the multicellular gametophyte 2 or 3 archegonia, each with an egg, develop inside More than a year after pollination, eggs are ready to be fertilized – pollen tube grows through One zygot ...
... Pollen grain burrows into ovule Cell undergoes meiosis to make 4 haploid megaspores; one survives and grows into the multicellular gametophyte 2 or 3 archegonia, each with an egg, develop inside More than a year after pollination, eggs are ready to be fertilized – pollen tube grows through One zygot ...
Gymnosperms P.P.
... sexual reproduction • Gametophyte is very reduced and does not develop in the soil as an independent generation, instead the tiny gametophyte is contained and protected within the moist reproductive tissue of the sporophyte • Evolution of the seed = protection of the dormant embryo from drying out, ...
... sexual reproduction • Gametophyte is very reduced and does not develop in the soil as an independent generation, instead the tiny gametophyte is contained and protected within the moist reproductive tissue of the sporophyte • Evolution of the seed = protection of the dormant embryo from drying out, ...
Moving onto Land Problems and Solutions
... Bogs—isolated wetlands. Bogs are carbon sinks. The acidic condition of bogs is due to Sphagnum moss. Few decomposers. Why? Cold, low oxygen (anoxic), and acidic conditions. This allows organic matter (i.e., peat) to accumulate in bogs. ...
... Bogs—isolated wetlands. Bogs are carbon sinks. The acidic condition of bogs is due to Sphagnum moss. Few decomposers. Why? Cold, low oxygen (anoxic), and acidic conditions. This allows organic matter (i.e., peat) to accumulate in bogs. ...
Lecture 1 Thursday Jan. 4, 2001
... species left of its once larger lineage. 1. "Maidenhair tree" has been cultivated for centuries in temple gardens of the orient (first China, then imported to Japan) then imported to botanical gardens of Europe; may no longer grow wild anywhere in the world, although there are reports of a few "wild ...
... species left of its once larger lineage. 1. "Maidenhair tree" has been cultivated for centuries in temple gardens of the orient (first China, then imported to Japan) then imported to botanical gardens of Europe; may no longer grow wild anywhere in the world, although there are reports of a few "wild ...
Plant Diversity I: The Colonization of Land
... pollen tube discharges two sperm into the embryo sac (the female gametophyte within an ovule). One sperm fertilizes the egg, the other combines with two nuclei to produce the food-storing endosperm. ...
... pollen tube discharges two sperm into the embryo sac (the female gametophyte within an ovule). One sperm fertilizes the egg, the other combines with two nuclei to produce the food-storing endosperm. ...
Slide 1
... • Different species release pollen at different times to avoid hybridization • The male cone has the microsporangia on scale-like sporophylls . – (n) microspores from by meiosis – They develop into pollen grains – Produces millions of pollen grains per branch ...
... • Different species release pollen at different times to avoid hybridization • The male cone has the microsporangia on scale-like sporophylls . – (n) microspores from by meiosis – They develop into pollen grains – Produces millions of pollen grains per branch ...
Lecture 6B
... • the triploid central cell form the endosperm • like animals – once the sperm enters the egg – no other sperm can enter – prevents polyspermy • the zygote develops into an embryo that is packaged along with food (endosperm) into the seed (embryo + endosperm + integuments/seed coat) • fruit begins t ...
... • the triploid central cell form the endosperm • like animals – once the sperm enters the egg – no other sperm can enter – prevents polyspermy • the zygote develops into an embryo that is packaged along with food (endosperm) into the seed (embryo + endosperm + integuments/seed coat) • fruit begins t ...
Compare and Contrast Process in Plants and
... 2. Locate the outermost floral whorl. You can find it at the base of the flower and resembles a green crown. These are the sepals, collectively called the calyx. Inner to the sepals but extending beyond them are the prominent petals, collectively known as the corolla. 3. At the center of the flower ...
... 2. Locate the outermost floral whorl. You can find it at the base of the flower and resembles a green crown. These are the sepals, collectively called the calyx. Inner to the sepals but extending beyond them are the prominent petals, collectively known as the corolla. 3. At the center of the flower ...
Topic Nine
... 9.1.4 Draw the structure of the ovary as seen using a light microscope. 9.1.5 Outline the processes involved in oogenesis including mitosis, cell growth, the two divisions of meiosis, the unequal division of cytoplasm and the degeneration of polar bodies. During fetal development in a girl: Germ c ...
... 9.1.4 Draw the structure of the ovary as seen using a light microscope. 9.1.5 Outline the processes involved in oogenesis including mitosis, cell growth, the two divisions of meiosis, the unequal division of cytoplasm and the degeneration of polar bodies. During fetal development in a girl: Germ c ...
Lecture 8: Plant Evolution
... k. Sperm cells are discharged by the egg l. One sperm fuses with the egg to form a zygote i. The germinated pollen grain with the new pine tube is the mature male gametophyte ii. The other sperm degenerates m. The tissue of the female gametophyte becomes nutritive tissue in the mature seed n. A seed ...
... k. Sperm cells are discharged by the egg l. One sperm fuses with the egg to form a zygote i. The germinated pollen grain with the new pine tube is the mature male gametophyte ii. The other sperm degenerates m. The tissue of the female gametophyte becomes nutritive tissue in the mature seed n. A seed ...
Erica-Mae N. Alim ABM-106 PERPETUATION OF LIFE Summary
... important in the survival and distribution of the plants speciea. there are different ways by which seeds are dispersed.external factors such as wind,animals,humans,and water help in the succesful dispersal of seeds.some seeds such as dandelion and mahogany have specialized structures intended for e ...
... important in the survival and distribution of the plants speciea. there are different ways by which seeds are dispersed.external factors such as wind,animals,humans,and water help in the succesful dispersal of seeds.some seeds such as dandelion and mahogany have specialized structures intended for e ...
Part 2-PP File - shscience.net
... FYI – External Fertilization • Gametes join outside of the female’s body in an water environment so sperm can swim to eggs • Large number of gametes (eggs) released to be sure some will survive (No parental care after birth) ...
... FYI – External Fertilization • Gametes join outside of the female’s body in an water environment so sperm can swim to eggs • Large number of gametes (eggs) released to be sure some will survive (No parental care after birth) ...
Plant Characteristics
... __1__ The zygote grows into a new sporophyte. _____ A mature sporophyte produces spores. _____ Sperm swim through a film of water and fertilize eggs. _____ The mature gametophytes produce gametes. _____ The spores fall to the ground and grow into haploid gametophytes. Number the order in which the s ...
... __1__ The zygote grows into a new sporophyte. _____ A mature sporophyte produces spores. _____ Sperm swim through a film of water and fertilize eggs. _____ The mature gametophytes produce gametes. _____ The spores fall to the ground and grow into haploid gametophytes. Number the order in which the s ...
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.