General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
111
Which type of learning occurs when an animal stops responding to a repetitive stimulus that carries no positive or negative consequences?
Answer:
Habituation
Habituation is one of the simplest forms of learning. It allows an animal to ignore irrelevant stimuli, thereby conserving energy and focusing attention on more important environmental cues like food or predators.
112
In animal behavior, a 'Fixed Action Pattern' (FAP) is typically triggered by a specific stimulus known as a:
Answer:
Sign stimulus
A sign stimulus is an external sensory cue that triggers a Fixed Action Pattern. For example, the red underside of an intruder male stickleback fish acts as a sign stimulus that triggers aggressive behavior in the resident male.
113
Which phylum is characterized by having a water vascular system and tube feet?
Answer:
Echinodermata
Echinoderms, such as starfish and sea urchins, utilize a unique water vascular system—a network of hydraulic canals—for locomotion, food and waste transportation, and respiration via their tube feet.
114
Animals that possess a true body cavity completely lined with mesoderm are classified as:
Answer:
Coelomates
Coelomates possess a 'true' coelom, which is a fluid-filled body cavity that develops entirely within the mesoderm germ layer. This allows for complex organ development and independent movement of internal organs relative to the body wall.
115
Which of the following taxonomic levels is the most inclusive?
Answer:
Phylum
In the biological hierarchy of classification, Phylum is higher and more inclusive than Class, Order, and Family. It groups together all organisms that share a basic body plan, such as the presence of a notochord in Chordata.