Which of the Following Makes Up Most of an Old

question 76

Multiple Choice

Which of the following makes up most of an old tree trunk?

• A)primary xylem
• B)secondary xylem
• C)primary phloem
• D)secondary phloem
• E)meristem tissue

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Definitions:

Hormone

Chemical messengers produced by the endocrine glands that regulate various bodily functions by traveling through the bloodstream to target organs.

Phytochromes

A type of photoreceptor in plants that absorbs light to regulate growth, development, and flowering in response to environmental conditions.

Nonphotosynthetic

Organisms or cells that do not have the ability to convert light energy into chemical energy through photosynthesis.

Pigments

Substances that give color to tissues, cells, and materials by absorbing certain wavelengths of light and reflecting others.