Find the Angle Between the Given Vectors to the Nearest $$\mathbf { u } = \langle - 4,2 \rangle , \mathbf { v } = \langle - 9 , - 3 \rangle$$

question 238

Multiple Choice

Find the angle between the given vectors to the nearest tenth of a degree.
- $$\mathbf { u } = \langle - 4,2 \rangle , \mathbf { v } = \langle - 9 , - 3 \rangle$$

• A) \(12.5 ^ { \circ }\)
• B) \(22.5 ^ { \circ }\)
• C) \(45.0 ^ { \circ }\)
• D) \(55.0 ^ { \circ }\)

Distinguish between constitutive and induced plant defenses.

Explain the role of specific molecules such as salicylic acid, terpenes, and alkaloids in plant defense mechanisms.

Describe the process and importance of signaling in plant defense responses.

Understand the role of pathogen Avr genes in eliciting plant defense responses.

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