Question

1. what makes an animal easy or difficult to study in a lab?

Explanation:

Factors like lifespan (short - lived animals easier for quick studies), size (smaller, more manageable), reproductive rate (high - rate for more samples), and adaptability to lab conditions (e.g., less stress - prone) make an animal easy. Difficulties include long lifespan (slow data collection), large size (space and handling issues), low reproductive rate (fewer specimens), and sensitivity to lab environment (stress - induced changes).

Answer:

An animal is easy to study in a lab if it has a short lifespan (for quick generation - to - generation studies), small size (easier to handle and house), high reproductive rate (more offspring for experiments), and good adaptability to lab conditions (less stress - related complications). It is difficult if it has a long lifespan (slow experimental progress), large size (space and practical handling problems), low reproductive rate (limited sample availability), and poor adaptability to the lab (stress - induced physiological or behavioral changes that confound results).