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Hace 5 días · A centrosome is a cellular structure involved in the process of cell division. Before cell division, the centrosome duplicates and then, as division begins, the two centrosomes move to opposite ends of the cell. Proteins called microtubules assemble into a spindle between the two centrosomes and help separate the replicated chromosomes into the ...
Hace 5 días · Definition. 00:00. …. A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called sperm. Ova and sperm are haploid cells, with each cell carrying only one copy of each chromosome. During fertilization, a sperm and ovum unite to form a new diploid organism.
Hace 3 días · Cell biology is the discipline of biological sciences that studies the structure, physiology, growth, reproduction and death of cells. Research in cell biology uses microscopic and molecular tools ...
Hace 2 días · Definition. An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.
Hace 1 día · Sponge biodiversity and morphotypes at the lip of a wall site in 60 feet (20 m) of water. Included are the yellow tube sponge, Aplysina fistularis, the purple vase sponge, Niphates digitalis, the red encrusting sponge, Spirastrella coccinea, and the gray rope sponge, Callyspongia sp. Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce ...
Hace 4 días · Lion, large, powerfully built cat that is second in size only to the tiger. The proverbial ‘king of the beasts,’ the lion has been one of the best-known wild animals since earliest times. Lions are most active at night and live in a variety of habitats but prefer grassland, savanna, dense scrub, and open woodland.
Hace 4 días · 9. • When the bottom of the culture vessel is covered with a continuous layer of cells (i.e. one cell in thickness) - monolayer cultures. • Ex: continuous cell lines. • Can be transferred directly and observed under microscope. Suspension cells • Do not attach; cells can survive and proliferate without attachment • Also called anchorage- independent or non-adherent cells • Can be ...
