The trees growing in desert will

Options

A. Show alternate rings of xylem and sclerenchyma
B. Have only conjunctive tissue and phloem formed by the activity of cambium
C. Show distinct annual rings
D. Not show distinct annual rings

Explanation

### Step-by-Step Solution:

1. **Understanding Tree Growth in Deserts**: Trees in desert environments face unique challenges, primarily due to water scarcity. This affects their growth patterns and the formation of specific structures within the tree.

2. **Role of Cambium**: The cambium layer is crucial for secondary growth in trees. It is responsible for producing secondary xylem (wood) and secondary phloem (part of the vascular system). The activity of the cambium varies with seasons, being more active during periods of abundant resources (like spring and summer) and less active during times of scarcity (like winter).

3. **Formation of Annual Rings**: In temperate climates, trees typically show distinct annual rings due to the variation in cambium activity across seasons. In spring and summer, when conditions are favorable, the cambium produces wider rings, while in winter, the rings are narrower due to reduced activity.

4. **Desert Trees and Annual Rings**: In desert environments, the consistent scarcity of water leads to a lack of distinct seasonal growth. As a result, trees in deserts do not form the typical annual rings seen in trees from more temperate regions. The cambium does not have the opportunity to create wide and narrow rings because the growth is limited year-round.

5. **Conclusion**: Therefore, the correct answer to the question about trees growing in deserts is that they do not show distinct annual rings due to the constant water scarcity.

### Final Answer:
The trees growing in deserts do not show distinct annual rings.

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