Tomato wilt is a viral disease. Q.3. (A) Name the following: (1) Small rod shaped microbes. 2) Two organisms
reproducing by 3) Two organs used for locomoti 4) Two eukaryotic organisms.
Answers
1. A bacillus (plural bacilli), or bacilliform bacterium, is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria. However, the name Bacillus, capitalized and italicized, refers to a specific genus of bacteria.
2. There are two forms of reproduction: asexual and sexual. In asexual reproduction, an organism can reproduce without the involvement of another organism. Asexual reproduction is not limited to single-celled organisms. The cloning of an organism is a form of asexual reproduction.
3. Examples of locomotory organs are flagella, cilia, pseudopodia etc. With respect to locomotion, locomotory movements primarily include the usage of feet for support. However, a human can travel using other parts of the body such as the hands and feet.
4. Organisms such as animals, plants, fungi, and protists are examples of eukaryotes because their cells are organized into compartmentalized structures called organelles, such as the nucleus.
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Answer:
Tomato spotted wilt, first described in Australia in 1919, was later identified as a virus disease. It is now common in temperate, subtropical, and tropical regions around the world
Explanation:
The "spotted wilt" disease of tomato was first described in Australia in 1915 and was determined to be of viral etiology in 1930 (Figs. 1,2). The Tomato spotted wilt virus (genus Tospovirus; family Bunyaviridae) (TSWV) was thought to be the sole member of the tomato spotted wilt virus group until 1989 when Impatiens necrotic spot virus was characterized. The genus Tospovirus now contains TSWV as the type member and more than a dozen other distinct viruses whose identification has been facilitated by the use of serological and molecular techniques. The tospoviruses are transmitted by thrips (Thysanoptera: Thripidae) and replicate in both the thrips vectors and the plant hosts. There are significant differences in tospoviruses and their relationship with specific thrips species, so what is presented herein on TSWV is not applicable to all tospovirus-thrips interactions.