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For all plato users-- (A. Fruiting Body)
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A structure grown by a pollen grain that contains two sperm nuclei is called what?
The two nuclei found inside each pollen grain are called tube nucleus and germ nucleus.
A species that contains two copies of each chromosome is called?
haploid
What is the best evidence telling you whether this cell is diploid or haploid?
The cell is diploid because it contains two sets of chromosomes.
When a cell contains only one chromosome of each homologous pair the cell is?
ploidy is the classification based on the number of homologous chromosomes present. if there is only one pair of homologous chromosomes then the nucleus is said to be haploid if there are two pairs then it is known as diploid if three it is triploid if many it is noted as polyploidy --------------------------- an oocyte or a spermatocyte are haploid cells in a species that normally have diploid cells.
Why do ciliates have two nuclei?
Ciliates contain a variety of organelles plus two kinds of nuclei. The larger type of nucleus, the macronucleus, contains a great deal more DNA than the smaller nucleus, the micronucleus.
Are pollen grains haploid or diploid if they have two nuclei the generative and the tube nuclei?
Pollen grains with generative and tube nuclei have two haploid nuclei.
A structure grown by a pollen grain that contains two sperm nuclei is called what?
The two nuclei found inside each pollen grain are called tube nucleus and germ nucleus.
What is the dikaryotic stage of a fungus life cycle?
This dikaryotic stage in fungi reproduction involves the formation of two haploid nuclei, which later merge into a single nucleus
How many pairs of the nucleus occur in meiosis?
in meiosis, two new haploid sex cells are "born" by the division of two other haploid sex cells. So, at the end, there are 4 nuclei.
What is the ploidy of ascocarp?
Ascocarp contain two haploid nuclei from different parents after undergoing plamogamy. This is a situation unique to fungi, and is defined to be dikaryotic.
A species that contains two copies of each chromosome is called?
haploid
What phylum contains organisms that must have two nuclei?
Phylum Ciliophora
How does the fungi isonotus hispidus reproduce?
Conviently, the fungus is a member of Basidiomycotina, which is so named for the method of sexual reproduction that occurs. It begins when two compatible haploid hyphae meet. Fusion of the hyphae occurs and gives rise to a dikaryotic hypha (that is it has two haploid nulcei), which grows into a mycelium with each cell having two nuclei. Eventually, the fungus gets a cue that it is time to reproduce. The hyphae begin to differentiate and give rise to fruiting structure you observe on tree trunks. Again, all of cells of this fruiting structure are dikaryotic. The underside of this fruiting structure has pores. These pores are lined with a layer of cells called the hymenium. Within this lining, special cells called basidia arise. It is within the basidia that sexual reproduction is completed. (It can be years, centuries even, between the start and finish of sexual reproduction!) It is within the basidia that the haploid nuclei finally fuse to form a diploid nucleus. This nucleus undergoes meiosis. During meiosis, sexual recombination occurs through the swapping of loci between paired chromosomes and the random segregation of chromosomes (one of each pair) into the two new haploid nuclei. These nuclei may divide mitotically to form more haploid nuclei or they may not. In either case, the new nuclei migrate toward the top of the basidia. There they migrate into buds being produced. These buds mature into the aptly named basidiospores. When mature, they will be forcibly flung toward the center of the pore. Gravity will bring them down and out of the pore where they will catch the wind and be carried to a new habitat. One there, they will grow into new haploid hyphae and start the process all over.
Is a mushroom diploid or haploid?
The thallus is haploid. It depends on the three basic life cycle of sexually reproducing fungi, in haplobiontic A life cycle, the thallus is haploid, in haplobiontic B life cycle the thallus is diploid and in diplobiontic life cycle, it has two thallus, a sporophytic thallus which is diploid and a gametophytic thallus which is haploid.
What is the difference between haploid diploid and zygote?
There are two types of cells in the body - haploid cells and diploid cells. The difference between haploid and diploid cells is related to the number of chromosomes that the cell contains.
In plants do kalanchoe form between the two new neclei?
Each nucleus divides by mitosis to become two nuclei. One is the tube nucleus. The other is a generative nucleus. The wall of the cell thickens to protect the developing pollen grain. As the anther ripens, the wall between the paired pollen sacs disappears. The pollen sacs burst open and the mature pollen grains are ready for dispersal. Each ovary contains one or more ovules. The green structure at the top of the diagram is the ovule. The integuments are the 2 walls of the ovule. There is a small opening in the walls called a micropyle. This is where the pollen tube will enter. The nucellus is cells that provide nutrition for the growth of the ovule. The embryo sac, also known as the megaspore, divides by meiosis to form 4 haploid cells. Three of these cells degenerate and one remains. Only one megaspore survives in each ovule. This becomes the embryo sac. The haploid nucleus of the surviving megaspore undergoes three mitotic divisions. Eight haploid nuclei are now present. Within the swollen 'megaspore cell' six haploid cells and two 'polar nuclei' are formed. The entire structure is called the embryo sac.
What have two nuclei what are their names and functions?
Most ciliates have two nuclei: a macronucleus that contains hundreds of copies of the genome and controls metabolisms, and a single small micronucleus that contains a single copy of the genome and functions in sexual reproduction.
