Practice check: In basic biology, which blood type is commonly called the universal red-cell donor in emergency contexts?

✅ C. Mesoderm.

Option A: Ectoderm. Option B: Endoderm. Option C: Mesoderm. Option D: All of these Correct Answer : Mesoderm. Read more

✅ C. Larynx

Option A: Buccal cavity Option B: Pharynx Option C: Larynx Option D: Chest Cavity Correct Answer : Larynx Read more

✅ C. A Tissue

Option A: An organ Option B: An organism Option C: A Tissue Option D: A Cell Correct Answer : A Tissue Read more

✅ A. Entomology

a: Entomology | b: Botany | c: Herpetology | d: Mycology Read more

✅ A. Lungs

a: Lungs | b: Gallbladder | c: Spleen | d: Heart Read more

✅ B. Starch

Option A: Cellulose Option B: Starch Option C: Glycogen Option D: All of these Correct Answer : Starch Read more

✅ D. 1%

Option A: 25% Option B: 10% Option C: 5% Option D: 1% Correct Answer : 1% Read more

✅ C. Tropomyosin gets removed from the binding sites of actin filaments.

Option A: Binding sites of actin get attached to the myosin hea Option B: Troponin uncovers the actin binding sites. Option C: Tropomyosin gets removed from the binding sites of actin filaments. Option D: Ca2+ goes back inside sarcoplasmic reticulum. Correct Answer : Tropomyosin gets removed from the binding sites of actin filaments. Read more