Danlimfl:

Gumbokins:

[quote=\"Danlimfl\"]Can help to solve this ? I got different answers from goggle

What common adaptations do the water lettuce and water moss fern have to keep their leaves afloat ?
A. They have fine hairs on their leaf surfaces
B. They have waterproof leaves
C. They have thick fleshy leaves
D. They have leaves that can trap air bubbles

(1) A and B (2) B and C (3) A,B and C (4) B,C and D

Thanks

By elimination:
B confirmed in
D is also in

however:
A: Fine hairs are usually for deterring insects from chewing
Fleshy leaves are for drought resistance, water plants may have thicker leaves that are waterproof though not considered fleshy

but if hairs on leaves are for trapping air bubbles, that means D is also correct? :scared: :nailbite:

The model answer is B and C . But I thought A and D also make sense since both plants have tiny air that trap air bubbles. So the next question will be whether the air bubbles can help the leaves to be buoyant or not.[/quote]Answer is (1). Both Water Lettuce and Moss exhibit tiny hairs that traps air. To stay afloat, leaves must be waterproof or trap air in them. Having thick leaves does not imply any context in this question to keeping afloat. Since Option (2), (3) and (4) have C, then the only correct answer is (1).

What are the timing like?