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The Texas A&M University College of Agriculture and Life Sciences (AgLifeSciences) is a college of Texas A&M University, a public land-grant research university in College Station, Texas. Agriculture and the Life Sciences have been part of the university since its founding in 1876 as the "Agricultural & Mechanical College of Texas."
Plant callus (plural calluses or calli) is a growing mass of unorganized plant parenchyma cells. In living plants, callus cells are those cells that cover a plant wound. In biological research and biotechnology callus formation is induced from plant tissue samples (explants) after surface sterilization and plating onto tissue culture medium in vitro (in a closed culture vessel such as a Petri ...
The disc-shaped body is divided into 7–10 sections, known as ribs; in the middle of each rib there are woolly areoles. [5] The body is a greenish-brown colour and may appear speckled from its covering of white scales . [6] The flowers of this cactus are yellow with red bases and the outer parts are very woolly. [5]
Sexual reproduction is the most common life cycle in multicellular eukaryotes, such as animals, fungi and plants. [6] [7] Sexual reproduction also occurs in some unicellular eukaryotes. [2] [8] Sexual reproduction does not occur in prokaryotes, unicellular organisms without cell nuclei, such as bacteria and archaea.
In biology, mating is the pairing of either opposite-sex or hermaphroditic organisms for the purposes of sexual reproduction. Fertilization is the fusion of two gametes. [1] Copulation is the union of the sex organs of two sexually reproducing animals for insemination and subsequent internal fertilization. [2]
The embryophytes (/ ˈ ɛ m b r i ə ˌ f aɪ t s /) are a clade of plants, also known as Embryophyta (Plantae sensu strictissimo) (/ ˌ ɛ m b r i ˈ ɒ f ə t ə,-oʊ ˈ f aɪ t ə /) or land plants.They are the most familiar group of photoautotrophs that make up the vegetation on Earth's dry lands and wetlands.
The calla lily is not a single flower. It is an inflorescence of tiny flowers pressed together on a central stalk that is surrounded by a large petal-like bract. [29] In those species that have more than one flower on an axis, the collective cluster of flowers is called an inflorescence. Some inflorescences are composed of many small flowers ...
Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft). They have complex ecologies and interactions with each other and their environments, forming intricate food webs . The scientific study of animals is known as zoology , and the study of animal behaviour is known as ethology .