____________ was first to propose an objective definition of instinct.

✅ A. Calcium

Option A: Calcium Option B: Silica Option C: Chitin Option D: Both A & B Correct Answer : Calcium Read more

✅ B. Raphe

Option A: Valve Option B: Raphe Option C: Pseudopodium Option D: Cilia or flagella Correct Answer : Raphe Read more

✅ D. All of these

Option A: Metabolic processes of an organism Option B: Providing energy Option C: Formation of sturctures Option D: All of these Correct Answer : All of these Read more

✅ C. Cyanobacteria

Option A: Algae Option B: Bacteria Option C: Cyanobacteria Option D: Chlamydomonas Correct Answer : Cyanobacteria Read more

✅ B. Parentral (via blood)

Option A: Aerosol Option B: Parentral (via blood) Option C: Skin penetration Option D: Unknown Correct Answer : Parentral (via blood) Read more

✅ D. Ancient bacteria

Option A: True bacteria Option B: False bacteria Option C: Recent bacteria Option D: Ancient bacteria Correct Answer : Ancient bacteria Read more

✅ B. Seed plants

Option A: Ferns Option B: Seed plants Option C: Both of these Option D: None of these Correct Answer : Seed plants Read more

✅ B. Mesodermal

Option A: Ectodermal Option B: Mesodermal Option C: Endodermal Option D: None of these Correct Answer : Mesodermal Read more