Search results
Results from the WOW.Com Content Network
In algae, the egg cell is often called oosphere. [citation needed] Drosophila oocytes develop in individual egg chambers that are supported by nurse cells and surrounded by somatic follicle cells. The nurse cells are large polyploid cells that synthesize and transfer RNA, proteins, and organelles to the oocytes.
In many algae (e.g., Chara), the main plant is haploid; oogonia and antheridia form and produce haploid gametes. The only diploid part of the life cycle is the spore (fertilized egg cell), which undergoes meiosis to form haploid cells that develop into new plants. This is a haplontic life cycle (with zygotic meiosis).
An oospore is a thick-walled sexual spore that develops from a fertilized oosphere in some algae, fungi, and oomycetes. [1] They are believed to have evolved either through the fusion of two species or the chemically induced stimulation of mycelia, leading to oospore formation. [2]
The three cell surfaces of an Oedogonium filamentous cell consist of polysaccharides, proteins and lipids which provide several functional groups capable of binding to heavy metal ions. [ 10 ] [ 11 ] Due to their position at the surface of a body of water, algal blooms can block out the sunlight from other organisms and deplete oxygen levels in ...
Contain cellulose in their cell walls rather than chitin, and coenocytic hypae rather than septate hyphae. [274] oosphere Female gamete of oomycetes; "egg" of the oogonium. [275] oospore 400x magnification showing oospores of Hyaloperonospora parasitica, a downy mildew The resting spore formed as a result of fertilization of the oosphere. Has a ...
The algae begins to rot at about 48 hours after coming onto land. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us ...
Dormant spores are formed, for example by certain fungi and algae, primarily in response to unfavorable growing conditions. Most eukaryotic spores are haploid and form through cell division, though some types are diploids or dikaryons and form through cell fusion. This type of reproduction can also be called single pollination. [citation needed]
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!