Which of the following leaf modifications is beneficial in a low-light environment, e. g., the understory of a rainforest? (more than one choice may apply.)

(a) iridescent and reflective.
(b) undersides are red from high levels of anthocyanin pigments.
(c) covered in hairs.
(d) have a large surface area.
(e) have very small surface area.
(f) sharp (nonphotosynthetic) spines.

A, B and D.

Explanation:

A) If a leaf is iridescent and reflects light or colors from other objects, it helps to stand out from the rest in a low-light environment.

B) The anthocyanin pigments give the leaf a different coloration, so it has a different impact in a darker o flat colored space.

D) Having a large surface area will help to stand out from plants with small leaves.

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explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only