The scientist who isolated the first antibiotic, penicillin, from Penicillium notatum was: MCQ with Answer and Explanation

Explanation:
A food chain is a linear sequence illustrating the transfer of energy and matter from one organism to another through consumption. A food web is a complex, interconnected network of multiple food chains, representing the realistic, multiple feeding relationships in an ecosystem. The pyramid of energy, which shows the amount of energy available at each trophic level, is always upright, never inverted, because energy is lost as heat at each transfer according to the 10% law. Thus, statements 1 and 2 are correct.

Explanation:
Mature mammalian RBCs are anucleate, having lost their nucleus during maturation. This provides more space for hemoglobin, enhancing oxygen transport. The reason correctly explains the assertion. Nucleated RBCs are found in other vertebrates.

Explanation:
Entomology is the study of insects. Ichthyology is fish, herpetology reptiles and amphibians, ornithology birds. Insects are the most diverse group of animals.