A male sporangium 91) What is a stigma in a plant? The female part of the carpal that receives the pollen. 92) What part of the plant is the protective chamber where the eggs develop? 93) Pollen grains develop in the _____ and are trapped by the ______. Anther and stigma 94) What are the green leaves that enclose the flower before the flower opens?
Each stamen generally has a stalk called the filament (from Latin filum, meaning "thread"), and, on top of the filament, an anther (from Ancient Greek anthera, feminine of antheros "flowery," from anthos "flower"), and pollen sacs, called microsporangia. The development of the microsporangia and the contained haploid gametophytes, (called pollen grains) is closely comparable with that of the microsporangia in gymnosperms or heterosporous ferns. The pollen is set free by the opening (dehiscence) of the anther, generally by means of longitudinal slits, but sometimes by pores, as in the heath family (Ericaceae), or by valves, as in the barberry family (Berberidaceae). It is then dropped, or carried by some external agent — wind, water or some member of the animal kingdom — onto the receptive surface of the carpel of the same or another flower, which is thus pollinated. It is the part that contains the sperm
Name and describe the function of the five plant hormone groups discussed in your text. 5. Describe sexual and asexual reproduction in flowering plants. Be specific in regards to flowering plants. 1) Monocots are shorts for “Monocotyledons” which means plants whose embryo has one cotyledon; whereas, Eudicots (Eudicotyledons) carry embryo with 2 cotyledons.
AP Bio 1982: Brendan Ramos In the life cycle of a fern and a flowering plant, compare and contrast each of the following: A. The gametophyte generation B. Sperm transport and fertilization C. Embryo protection A. Small multicellular male and female gametophytes are produced within the flower of the sporophyte in flowering plants. The gameteophyte of a fern consists of a free-living distinct plant called the prothallus on which structures called archegonia and antheridia produce eggs and sperm respectively.
The Fallopian tubes are a pair of long narrow tubes connecting the ovaries to the uterus. Egg cells are passed to the uterus through the fallopian tubes .The egg may also be fertilized while in the Fallopian tubes if sperm is present following sexual intercourse. The vagina is an elastic muscular tube with a soft, flexible lining that provides sensation. The vagina attaches the uterus to the outside world. The vagina takes the penis during sexual intercourse and also aids as a tube for menstrual flow from the uterus.
After meiosis the cells then undergo one round of mitotic division which gives rise to a total of eight haploid ascospores. Although S. fimicola is self fertile they can be crossed. It is the sexual phase where two haploid strains can fuse to form diploid zygotes (Mertens, 2001). These diploid zygotes are encased in the ascus. If two mycelia meet the two haploid nuclei can fuse to form a heterozygous diploid.
Therefore the purpose of meiosis is to produce gametes; the sperm and eggs. 3. In what ways is meiosis different from mitosis? Be thorough. Comparison chart | Meiosis | Mitosis | Definition: | A type of cellular reproduction in which the number of chromosomes are reduced by half through the separation of homologous chromosomes in a diploid cell.
New York: DK Pub, 2002. 104-107. The botanical name for the Begonias is Begonia. Begonias are found in tropical to warm temperate climates most frequent in South America, but not found in Australasia or the Pacific Islands. There are 900 mainly perennial species.
Flower color or purple or white. Flower position is on stem or at tip. Stem length is tall or dwarfs. Seed shape is smooth or wrinkled. Seed color is yellow or green.
The trees have adventitious roots that bud out from the trunk, and the female trees appear to bear pineapples. The pineapple –like flower is actually made up of a cluster of seeds or keys that range in color from reddish to bright orange to golden. The male trees are called hinano (Hawaiian word), and usually have less leaves, and have a much more fragrant flower. The leaves of the hala tree are long and skinny with thorny edges and midribs along the base. Most of the leaves are green, but there are some hybrid species now with yellow and green striped