Microspore tetrad cells arethe microspores arranged in a group of four. Microspores are formed from microspore mother cell (MMC). MMC is a diploid cell which undergoes meiosis to form four haploid microspores which are arranged in a tetrad. This process is known as microsporogenesis. Are humans...
How are spores formed asexually? Spore Formation is a method in Asexual Reproduction. ...When Sporangia burst; minute single-celled, thin or thick walled structures called spores areobtained. Under suitable conditions, they develop into a new Plant. Reproducing using spores is an asexual method....
Where Clouds Are Formed . Tucson: University of Arizona Press, 2008. 96 pp. Paper , $14.95. Ofelia Zepeda's latest book of poetry explores what it means to be O'odham in a rapidly changing world while at the same time invoking a deeply felt sense of O'odham identity that is tied to...
If a sperm has 2 chromosomes, and the egg does, too, what is 2n of the resulting zygote? In humans, where does fertilization occur? How does the stamen release sperm in pollen? Where does meiosis occur in flowering plants? Summarize what changes must take place in the sperm and ovum to...
Individual bee collecting pollen on behalf of the entire hive Image Credit: Wikipedia Against Idleness and Mischief — last two stanzas In Works of Labour or of SkillI would be busy too:For Satan finds some Mischief stillFor idle Hands to do.In Books, or Work, or healthful PlayLet my fi...
a细胞渗透压、酶的组成,激素以及酸碱度的微小差异都可阻止外来花粉的发芽 The cell osmotic pressure, the enzyme composition, the hormone as well as the pH value small difference all may prevent the external pollen to germinate[translate] acatch the bus 捉住公共汽车[translate] ...
intestines of frugivores without need of further processing. Conversely, most floral nectars have sucrose as their predominant sugar. Sucrose is a disaccharide formed from glucose and fructose and cannot be absorbed by the intestines until it is broken down into glucose and fructose by the enzyme ...
Boron is integral to a plant’s reproductive cycle; controlling flowering, pollen production, germination, and seed and fruit development. The mineral also acts as a fuel pump, aiding the transmission of sugars from older leaves to new growth areas and root systems. Fields of cotton, canola, ...
Name the nucleus formed after the triple fusion. View Solution Where does krebs cycle take place? View Solution Triple fusion produces View Solution Where doesC3cycle take place? View Solution what is protoplast fusion ? View Solution What is air pollution? How does this pollution take place?
The study of fossils is called palaeontology; someone who collects and studies them is called a palaeontologists. Fossils can be as tiny as a grain of pollen or a seed for e.g. or as huge as a limb bone from a giant dinosaur. For animal or plant remains to have become ‘fossilised ...