576: Consider the following statements:
1. Femur is the longest bone in the human body.
2. Cholera is a disease caused by bacteria.
3. Athlete's foot's is a disease caused by virus.
Which of the statements given above are correct?
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Explanation:
Athlete's foot is a disease caused by Tinea pedis, a fungus. The fungus grows well on the moist skin between toes. The infected skin becomes itchy and red.
577: Many transplanted seedlings do not grow because
(a) the new soil does not contain favourable minerals
(b) most of the root hairs grip the new soil too hard
(c) most of the root hairs are lost during transplantation
(d) leaves get damaged during transplantation
Explanation:
Option C is the right explanation of the question
578: In the context of digital technologies for entertainment, consider the following statements:
1. In Augmented Reality (AR), a simulated environment is created and the physical world is completely shut out.
2. In Virtual Reality (VR), images generated from a computer are projected onto real-life objects or surroundings.
3. AR allows individuals to be present in the world and improves the experience using the camera of smart-phone or PC.
4. VR closes the world, and transposes an individual, providing complete immersion experience.
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 3 and 4
(c) 1, 2 and 3
(d) 4 only
Explanation:
Virtual reality (VR) immerses users in a fully artificial digital environment.
Augmented reality (AR) overlays virtual objects on the real-world environment.
Mixed reality (MR) not just overlays but anchors virtual objects to the real world.
Source: https://www.forbes.com/sites/quora/2018/02/02/the-difference-between-virtual-reality-augmented-reality-and-mixed-reality/#5527da952d07
https://www.fi.edu/difference-between-ar-vr-and-mr
579: The word "Denisovan" is sometimes mentioned in media in reference to
(a) fossils of a kind of dinosaurs
(b) an early human species
(c) a cave system found in North-East India
(d) a geological period in the history of the Indian subcontinent
Explanation:
For the first time, scientists have found fossils from an extinct ancient human lineage known as the Denisovans outside of Siberia.
Denisovans were an extinct group of hominins that were close relatives of Neanderthals. They are known primarily from a handful of fossil fragments found at Denisova Cave in Siberia, and from genetic clues that linger in the DNA of people across Asia.
Source: Nature. com https://www.nature.com/articles/d41586-019-00672-2
580: Soils of Western Rajasthan have a high content of
(a) Aluminium
(b) Calcium
(c) Nitrogen
(d) Phosphorus