Problem 1 - Biology: The Dynamic Science

Question

Which best describes a micronutrient? a.It makes up \(96 \%\) of the plant's dry mass. b. It cannot be replaced artificially. c. It is early on the periodic chart compared with macronutrients. d. It is required in large amounts during sunlight hours. e. It is an essential element.

Step-by-Step Solution

Answer

The best description for a micronutrient is 'e. It is an essential element'.

Step 1: Understand the term 'Micronutrient'

Micronutrients are vitamins and minerals that our bodies need in small quantities to function properly. Such substances are required by an organism in only minute amounts.

Step 2: Evaluate each option carefully

Let's evaluate each given option: \n(a) Micronutrients do not make up the major part of a plant's dry mass.\n(b) Artificial supplements do exist for micronutrients, so this statement does not fit either.\n(c) Its position on the periodic table does not define whether an element is a micronutrient or not, so this option can be disregarded.\n(d) The amount required during sunlight hours is irrelevant to the definition of a micronutrient.\n(e) Micronutrients are indeed essential elements, though they are needed only in small amounts. So, this statement is closest to the actual definition.

Step 3: Select the correct Answer

Comparing all the options, e. It is an essential element, fits best with the definition of a micronutrient, as they are essential for normal physiological function but are required only in small amounts.