Isomers are molecules with the same chemical formula but different structures. Structural isomers differ in arrangement, geometric isomers have different spatial arrangements, and stereoisomers have the same connectivity but differ in spatial arrangement.
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DDT (dichlorodiphenyltrichloroethane) is a synthetic pesticide once widely used to control insect-borne diseases like malaria. Its environmental persistence and harmful effects led to bans in many countries.
Examples of asexually reproducing species include bacteria (binary fission), plants (runners, bulbs), and some animals (parthenogenesis). Offspring inherit genetic material from a single parent, lacking genetic variation.
Asexual reproduction involves the creation of offspring without the union of gametes. It results in genetically identical or nearly identical offspring to the parent, common in plants, bacteria, and fungi.
Chromosomes are thread-like structures in cells containing DNA. They carry genetic information, determining an organism’s traits. Humans have 23 pairs, with one set inherited from each parent.
kisan diwas or national farmers day. This day honours the birth anniversary of Chaudhary Charan Singh, the fifth Prime Minister of India, who was a champion of farmers’ rights and rural development.
Male gamete (sperm) is small, mobile, and contributes genetic material. Female gamete (egg) is larger, non-motile, and provides nutrients. Fusion during fertilization forms a zygote, initiating development.
Recently, Vivek Bindra and Sandeep Maheshwari, The two popular YouTubers and well-known motivational speakers are trading verbal volleys over charges of ‘scam’ regarding a business course.
National Mathematics Day is celebrated on December 22 in India to honor mathematician Srinivasa Ramanujan’s birth anniversary, promoting mathematical awareness and education.
NCERT Solutions for Class 8 Social Science Geography Chapter 1 Resources and development Question 1(iv). Page No. 5 NCERT Academic Session 2023-2024