By trapping insects, carnivorous plants obtain ___________, which they need ___________ . (Choose the best answer.)
a. Water ... because they live in dry soil
b. Nitrogen ... to make sugar
c. Phosphorus ... to make protein
d. Nitrogen ... to make protein

Verified step by step guidance

1. Understand the context: Carnivorous plants live in nutrient-poor environments, particularly soils that lack essential nutrients like nitrogen and phosphorus. They trap insects to supplement their nutrient intake.
2. Identify the key nutrient: Carnivorous plants primarily trap insects to obtain nitrogen, which is often deficient in their environment.
3. Determine the biological purpose: Nitrogen is a critical component of amino acids, which are the building blocks of proteins. Proteins are essential for the plant's growth and metabolic functions.
4. Eliminate incorrect options: a) Water is not the primary reason for trapping insects. b) Nitrogen is not used to make sugar; sugar is produced through photosynthesis. c) Phosphorus is important but not the primary nutrient obtained from insects.
5. Select the correct answer: The best answer is d) nitrogen ... to make protein, as it aligns with the biological role of nitrogen in protein synthesis.

Key Concepts

Carnivorous Plants

Carnivorous plants are specialized plants that derive some or most of their nutrients from trapping and consuming animals, primarily insects. This adaptation allows them to thrive in nutrient-poor environments, where traditional sources of nutrients like nitrogen and phosphorus are scarce.

Nitrogen in Plants

Nitrogen is an essential macronutrient for plants, playing a critical role in the synthesis of amino acids, proteins, and nucleic acids. Since many plants, including carnivorous ones, often grow in nitrogen-deficient soils, they have evolved mechanisms to obtain nitrogen from their prey.

Protein Synthesis

Protein synthesis is the process by which cells construct proteins, which are vital for various biological functions, including growth, repair, and enzyme activity. In plants, proteins are synthesized from amino acids, which are derived from nitrogen, making it crucial for their overall health and development.