crayfish dissection - Solon City Schools
... Move water over EGGS, transfer sperm (males) carry young/eggs (females) Propulsion during tailflips ...
... Move water over EGGS, transfer sperm (males) carry young/eggs (females) Propulsion during tailflips ...
Unit XI: Plant Structure and Function
... Sporophyte (diploid) • actual plant with flowers Gametophyte (haploid) • male: germinated pollen grain • female: embryo sac Fertilization • joins two gametes to form a zygote ...
... Sporophyte (diploid) • actual plant with flowers Gametophyte (haploid) • male: germinated pollen grain • female: embryo sac Fertilization • joins two gametes to form a zygote ...
Unit XI: Plant Structure and Function
... Sporophyte (diploid) • actual plant with flowers Gametophyte (haploid) • male: germinated pollen grain • female: embryo sac Fertilization • joins two gametes to form a zygote ...
... Sporophyte (diploid) • actual plant with flowers Gametophyte (haploid) • male: germinated pollen grain • female: embryo sac Fertilization • joins two gametes to form a zygote ...
Seedless Plants
... Tropisms are responses in which the direction of the movement is determined by the direction of the stimuli. Tropisms are growth movements that happen slowly and whose results are irreversible. If a plant reacts toward the stimuli, this is said to be a positive tropism but if the plant reacts away ...
... Tropisms are responses in which the direction of the movement is determined by the direction of the stimuli. Tropisms are growth movements that happen slowly and whose results are irreversible. If a plant reacts toward the stimuli, this is said to be a positive tropism but if the plant reacts away ...
Introduction to Bryophytes Notes Understand: • The main groups in
... • [Haploid = 1 set of chromosomes. Mitosis = cell division, 1 cell divides to produce 2 new cells, each with the same number, ie 1 set, of chromosomes.] • The spermatozoids swim through the surface film of moisture to reach the eggs • Eggs remain inside the thallus but open to the outside via po ...
... • [Haploid = 1 set of chromosomes. Mitosis = cell division, 1 cell divides to produce 2 new cells, each with the same number, ie 1 set, of chromosomes.] • The spermatozoids swim through the surface film of moisture to reach the eggs • Eggs remain inside the thallus but open to the outside via po ...
Human Development
... • The mucous plug in her cervix will be thin and watery; sperm can easily penetrate it • Most sperm will die in her vagina, but a few million (1 - 2%) are pulled through the cervix, into the uterus, and into the Fallopian tubes where they are propelled toward the ampulla (+100,000 make it this far) ...
... • The mucous plug in her cervix will be thin and watery; sperm can easily penetrate it • Most sperm will die in her vagina, but a few million (1 - 2%) are pulled through the cervix, into the uterus, and into the Fallopian tubes where they are propelled toward the ampulla (+100,000 make it this far) ...
Sexual Reproduction in Plants
... of the mouth and itchy watery eyes. It is caused by the pollen of certain windpollinated plants e.g. grass ...
... of the mouth and itchy watery eyes. It is caused by the pollen of certain windpollinated plants e.g. grass ...
SURVIVAL
... If the flowers are dull and not easily seen then their pollen is carried by the Wind ...
... If the flowers are dull and not easily seen then their pollen is carried by the Wind ...
Nat 4 Multicelular Organisms Homework
... 1. Copy and complete the table below. If the word underlined is true then put a tick in the True column, if it is wrong put a tick in the False column and put the correct word in the ...
... 1. Copy and complete the table below. If the word underlined is true then put a tick in the True column, if it is wrong put a tick in the False column and put the correct word in the ...
video slide
... 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 ...
"A flower is a leaf, mad with love"
... About 95% of the species of flowering plants on Earth are hermaphroditic. This means that each individual plant is both male and female. In many cases, each individual flower contains both male and female organs, side-byside. This has the obvious advantage of doubling the chance of successful insemi ...
... About 95% of the species of flowering plants on Earth are hermaphroditic. This means that each individual plant is both male and female. In many cases, each individual flower contains both male and female organs, side-byside. This has the obvious advantage of doubling the chance of successful insemi ...
Role of reproductive hormones
... during the journey (1-5 hours). Using enzymes, from the acrosome, one sperm penetrates the egg, leaving its body and tail behind. The vitelline membrane thickens to prevent other sperm from penetrating. The nuclei of the egg and sperm fuse, forming a zygote. Egg lives for 24-48 hours and sperm (in f ...
... during the journey (1-5 hours). Using enzymes, from the acrosome, one sperm penetrates the egg, leaving its body and tail behind. The vitelline membrane thickens to prevent other sperm from penetrating. The nuclei of the egg and sperm fuse, forming a zygote. Egg lives for 24-48 hours and sperm (in f ...
Document
... spermatogenesis starts at puberty versus oogenesis starts in the fetus; spermatogenesis until death versus oogenesis until menopause; spermatogenesis continuously versus oogenesis in a cycle; millions of sperm daily versus one egg per month; ejaculation of sperm any time versus ovulation in middle o ...
... spermatogenesis starts at puberty versus oogenesis starts in the fetus; spermatogenesis until death versus oogenesis until menopause; spermatogenesis continuously versus oogenesis in a cycle; millions of sperm daily versus one egg per month; ejaculation of sperm any time versus ovulation in middle o ...
Vascular Seed Plants (Spermatophytes)
... directly out of the gametophyte. Ferns have spores, which are thickwalled haploid cells that can grow into haploid gametophytes. ...
... directly out of the gametophyte. Ferns have spores, which are thickwalled haploid cells that can grow into haploid gametophytes. ...
1 of 20: Name the waxy layer of many leaves to
... represents plant(s) that have a vascular system? ...
... represents plant(s) that have a vascular system? ...
Cycads
... (i.e. male and female reproductive structures are borne on separate plants), and reproduction is by seeds produced on open carpophylls or seedbearing leaves. Although technically woody plants, unlike other woody plants, cycads have a thick, soft stem or trunk made up of mostly storage tissue with ve ...
... (i.e. male and female reproductive structures are borne on separate plants), and reproduction is by seeds produced on open carpophylls or seedbearing leaves. Although technically woody plants, unlike other woody plants, cycads have a thick, soft stem or trunk made up of mostly storage tissue with ve ...
Introduction to Plants - Clark Pleasant Community School Corp
... • Archegonia are egg producing structures • Fertilization forms a zygote (2n), which develops into a sporophyte plant (2n) • The sporophyte develops into the leafy fern we recognize, and will go on to produce haploid spores ...
... • Archegonia are egg producing structures • Fertilization forms a zygote (2n), which develops into a sporophyte plant (2n) • The sporophyte develops into the leafy fern we recognize, and will go on to produce haploid spores ...
Document
... • Produce microspores that develop into pollen grains containing gametophytes • Consists of a stalk called a filament and a terminal anther where pollen is produced • Each pollen grain contains a male gametophyte consisting of 2 haploid cells one divides to form 2 sperm, the other, a tube cell produ ...
... • Produce microspores that develop into pollen grains containing gametophytes • Consists of a stalk called a filament and a terminal anther where pollen is produced • Each pollen grain contains a male gametophyte consisting of 2 haploid cells one divides to form 2 sperm, the other, a tube cell produ ...
Seeds
... Monocotyledons - One of the two major groups of angiosperms characterized by the presence of one seed leaf Monoecious - An individual that produces both pistillate and staminate flowers Nucellus - Megasporangium of seed plants Nut - A dry indehiscent fruit derived from a compound ovary and having a ...
... Monocotyledons - One of the two major groups of angiosperms characterized by the presence of one seed leaf Monoecious - An individual that produces both pistillate and staminate flowers Nucellus - Megasporangium of seed plants Nut - A dry indehiscent fruit derived from a compound ovary and having a ...
Test 2 Review
... a) Ferns need water to transport sperm to the egg. *b) Ferns have gametophytes that are dependent on the sporophyte. c) Ferns have spores. d) Ferns have bisexual gametophytes. e) Ferns use meiosis to produce haploid spores. 112. In seed-producing plants, the gametophyte is greatly reduced in size. W ...
... a) Ferns need water to transport sperm to the egg. *b) Ferns have gametophytes that are dependent on the sporophyte. c) Ferns have spores. d) Ferns have bisexual gametophytes. e) Ferns use meiosis to produce haploid spores. 112. In seed-producing plants, the gametophyte is greatly reduced in size. W ...
Plants I
... Increasingly (evolution) dominated by sporophytes Heterosporous: a few large, sessile, female spores and many small motile male spores ...
... Increasingly (evolution) dominated by sporophytes Heterosporous: a few large, sessile, female spores and many small motile male spores ...
5. Plant diversity
... Characteristics of Bryophytes or Nonvascular plants -no vascular tissue absorbing water by capillarity and transporting carbohydrates by diffusion -no true roots, stems, or leaves as lack vascular tissue. Rhizoids are root-like but are only used for anchorage. -Alternation of generations and gameto ...
... Characteristics of Bryophytes or Nonvascular plants -no vascular tissue absorbing water by capillarity and transporting carbohydrates by diffusion -no true roots, stems, or leaves as lack vascular tissue. Rhizoids are root-like but are only used for anchorage. -Alternation of generations and gameto ...
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.