Practice check: Choose the correct biology answer: which organ is primarily responsible for gas exchange in humans?

✅ D. Phloem

a: Stomata | b: Xylem | c: Cuticle | d: Phloem Read more

✅ C. 200 ml

Option A: 10 ml Option B: 100 ml Option C: 200 ml Option D: 100ml Correct Answer : 200 ml Read more

✅ A. Few millimeter wide to more than one meter tall

Option A: Few millimeter wide to more than one meter tall Option B: Few centimeter wide to more than one meter tall Option C: Few decimeter wide to more than one meter tall Option D: One meter wide to more than millimeter tall. Correct Answer : Few millimeter wide to more than one meter tall Read more

✅ A. Xylem

a: Xylem | b: Epidermis | c: Phloem | d: Cortex only Read more

✅ D. Edward Jenner in 1795

Option A: Fleming in 1945 Option B: Florey & Chain in 1975 Option C: Flore & Chain in 1795 Option D: Edward Jenner in 1795 Correct Answer : Edward Jenner in 1795 Read more

✅ C. Defined grana and stroma

Option A: Chloryphyllpigments Option B: Enzymes for photolysis Option C: Defined grana and stroma Option D: Carotenes with chlorophylls Correct Answer : Defined grana and stroma Read more

✅ B. Internal Body cavity

Option A: External space Option B: Internal Body cavity Option C: In gut Option D: In Bladder Correct Answer : Internal Body cavity Read more

✅ D. Phloem

a: Cuticle | b: Xylem | c: Stomata | d: Phloem Read more