Examine flowers, pollen tubes growing, and chromosomes under
... of genetic information in meiosis tends to be restricted to near the chromosome ends (hence the doughnut shapes). As a result genes in the middle of the chromosomes are rarely “shuffled”. This reduces the amount of variation for breeders to use. We are currently trying to overcome this problem. ...
... of genetic information in meiosis tends to be restricted to near the chromosome ends (hence the doughnut shapes). As a result genes in the middle of the chromosomes are rarely “shuffled”. This reduces the amount of variation for breeders to use. We are currently trying to overcome this problem. ...
Introduction to plants
... Alternation of generations life cycle Diploid (2n) sporophyte stage Haploid (1n) gametophyte stage Produce multicellular embryo protected inside multicellular haploid (gametophyte egg sac) tissue ...
... Alternation of generations life cycle Diploid (2n) sporophyte stage Haploid (1n) gametophyte stage Produce multicellular embryo protected inside multicellular haploid (gametophyte egg sac) tissue ...
asexual reproduction
... characteristics. Also produce small amounts of testosterone that is responsible for sexual desire. •Fallopian tube (oviducts) – tubes leading from the ovaries to the uterus. They are connected to the uterus but not the ovary. The fimbriae hover over the ovary and collect the oocyte once it is releas ...
... characteristics. Also produce small amounts of testosterone that is responsible for sexual desire. •Fallopian tube (oviducts) – tubes leading from the ovaries to the uterus. They are connected to the uterus but not the ovary. The fimbriae hover over the ovary and collect the oocyte once it is releas ...
class : xii - Gitarattan Jindal Public School
... Q5.Which nuclei fuse to give rise to endosperm? Q6.What is double fertilisation? Q7.What is shield shaped single cotyledon of monocots called? Q8.Who discovered double fertilisation in angiosperms? Q9.Name a triploid tissue in the seed. Q10.Name a plant where dichogamy is found. Q11.Name a plant whi ...
... Q5.Which nuclei fuse to give rise to endosperm? Q6.What is double fertilisation? Q7.What is shield shaped single cotyledon of monocots called? Q8.Who discovered double fertilisation in angiosperms? Q9.Name a triploid tissue in the seed. Q10.Name a plant where dichogamy is found. Q11.Name a plant whi ...
seed
... Based on the ABC model for flower development, if ‘A’ class genes are missing, what develops? ...
... Based on the ABC model for flower development, if ‘A’ class genes are missing, what develops? ...
3/3/2015 1 Chapter 30: 1. General Features of
... Megaspore (gives rise to a female gametophyte) ...
... Megaspore (gives rise to a female gametophyte) ...
Exam 2 Sample Questions
... 140. Only angiosperms have ____, while both angiosperms and gymnosperms have ____. a) ovaries, ovules b) ovules, ovaries c) eggs, zygotes d) embryos; flowers e) sporophytes; gametophytes 142. In angiosperms, food for the embryo comes from the _________. a) female gametophyte b) endosperm c) female s ...
... 140. Only angiosperms have ____, while both angiosperms and gymnosperms have ____. a) ovaries, ovules b) ovules, ovaries c) eggs, zygotes d) embryos; flowers e) sporophytes; gametophytes 142. In angiosperms, food for the embryo comes from the _________. a) female gametophyte b) endosperm c) female s ...
Answers to Mastering Concepts Questions - McGraw
... A fern’s spores are similar to seeds in that both participate in reproduction and dispersal. However, a spore is a haploid structure produced by meiosis; a seed contains a diploid embryo and its food supply packaged inside a tough outer coating. Unlike spores, seeds may stay dormant for years until ...
... A fern’s spores are similar to seeds in that both participate in reproduction and dispersal. However, a spore is a haploid structure produced by meiosis; a seed contains a diploid embryo and its food supply packaged inside a tough outer coating. Unlike spores, seeds may stay dormant for years until ...
Chapter 10: Terrestial Plants
... In order for plants to survive and reproduce outside the aquatic or marine environment, several challenges needed to be overcome. Plants must now: 1) hold themselves up to the sun 2) obtain sufficient water and nutrients 3) transport and distribute water and dissolved minerals 4) transport food prod ...
... In order for plants to survive and reproduce outside the aquatic or marine environment, several challenges needed to be overcome. Plants must now: 1) hold themselves up to the sun 2) obtain sufficient water and nutrients 3) transport and distribute water and dissolved minerals 4) transport food prod ...
Human Reproduction
... Cumulus oophorus (Granulosa cells, together with the oocyte) Basal lamina between theca and stratum granulosum ...
... Cumulus oophorus (Granulosa cells, together with the oocyte) Basal lamina between theca and stratum granulosum ...
Name - Tacoma Community College
... male cones shrivel up and fall off. In the female cones’ sporangia, all the spores die except one. That remaining spore divides many times, making an egg or two within sacs, surrounded by nutritious tissue. Step 3. The pollen lands on the female cones (usually before they are even done making the e ...
... male cones shrivel up and fall off. In the female cones’ sporangia, all the spores die except one. That remaining spore divides many times, making an egg or two within sacs, surrounded by nutritious tissue. Step 3. The pollen lands on the female cones (usually before they are even done making the e ...
File
... Locomotion, move water over gills Move water over EGGS, transfer sperm (males) carry young/eggs (females) Propulsion during tailflips ...
... Locomotion, move water over gills Move water over EGGS, transfer sperm (males) carry young/eggs (females) Propulsion during tailflips ...
Topic Three - Jordan Bilozir Science 9
... are produced from this union have a mix of characteristics, half from one parent and the other half from the other parent. Sexual reproduction does not always involve male and female parents, but can have specialized gametes (reproductive cells that have only one role - to join with another gamete d ...
... are produced from this union have a mix of characteristics, half from one parent and the other half from the other parent. Sexual reproduction does not always involve male and female parents, but can have specialized gametes (reproductive cells that have only one role - to join with another gamete d ...
Seed Plants
... If pollination is more likely and more random by this method, why don’t we see many hybrids? ...
... If pollination is more likely and more random by this method, why don’t we see many hybrids? ...
Chapter 30 PowerPoint
... • 1 from each group of 4 migrates toward center – Functions as polar nuclei – may fuse ...
... • 1 from each group of 4 migrates toward center – Functions as polar nuclei – may fuse ...
Document
... • 1 from each group of 4 migrates toward center – Functions as polar nuclei – may fuse ...
... • 1 from each group of 4 migrates toward center – Functions as polar nuclei – may fuse ...
Plant Reproduction - Cal State LA
... Pollen grain germination – Tube nucleus produces pollen tube, which grows down through the style to the ovary – Generative nucleus divides to produce two sperm ...
... Pollen grain germination – Tube nucleus produces pollen tube, which grows down through the style to the ovary – Generative nucleus divides to produce two sperm ...
EXERCISE 1: Cycadophyta: The Cycads
... What is happening in the megasporangium in the series of illustrations below? ...
... What is happening in the megasporangium in the series of illustrations below? ...
Chapter 27
... a) Carpels produce ovules, which ultimately may develop into seeds b) The female portion of the flower is sometimes referred to as a pistil (1) The pistil may consist of a single carpel (simple pistil) or several fused carpels (compound pistil) c) Each pistil has a stigma at the distal end, where th ...
... a) Carpels produce ovules, which ultimately may develop into seeds b) The female portion of the flower is sometimes referred to as a pistil (1) The pistil may consist of a single carpel (simple pistil) or several fused carpels (compound pistil) c) Each pistil has a stigma at the distal end, where th ...
Reproduction
... Use the terms from the following list to complete the sentences below. embryo sperm ovary egg placenta fallopian tube uterus fetus menstruation 58. At the earliest stages of development, during week 3 and before week 9 or 10 of the pregnancy, the offspring is called a(n) ____________________. ...
... Use the terms from the following list to complete the sentences below. embryo sperm ovary egg placenta fallopian tube uterus fetus menstruation 58. At the earliest stages of development, during week 3 and before week 9 or 10 of the pregnancy, the offspring is called a(n) ____________________. ...
MT1-Review-plants
... - Ferns were the first vascular plants, meaning they have water-conducting tissue. - Unique because of independent gametophyte, independent sporophyte - Gametophyte is tiny and fragile but photosynthetic. Sporophyte emerges from it. - Like in bryophytes, sperm are flagellated and must swim to archeg ...
... - Ferns were the first vascular plants, meaning they have water-conducting tissue. - Unique because of independent gametophyte, independent sporophyte - Gametophyte is tiny and fragile but photosynthetic. Sporophyte emerges from it. - Like in bryophytes, sperm are flagellated and must swim to archeg ...
- Academy Test Bank
... 62. D 63. C 64. In the female reproductive system, the ovaries contain eggs. When an egg ripens and leaves the ovary, it is drawn into the oviduct, or fallopian tube, where fertilization could take place if sperm are present. This results in a zygote. The oviduct is lined with cilia, which propel th ...
... 62. D 63. C 64. In the female reproductive system, the ovaries contain eggs. When an egg ripens and leaves the ovary, it is drawn into the oviduct, or fallopian tube, where fertilization could take place if sperm are present. This results in a zygote. The oviduct is lined with cilia, which propel th ...
Zea mays -
... are produced; one sperm cell fuses with the egg resulting in zygote; other sperm cells fuses with central cell giving start to development of triploid tissue called endosperm which surrounds the embryo and serves an absorbtive/nutritive function in seed ...
... are produced; one sperm cell fuses with the egg resulting in zygote; other sperm cells fuses with central cell giving start to development of triploid tissue called endosperm which surrounds the embryo and serves an absorbtive/nutritive function in seed ...
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.