spike has

Options

A. pedicellate flowers
B. complete flowers
C. sessile flowers
D. unisexual flowers

Answer

To answer the question "What does a spike have?" we need to understand the characteristics of a spike inflorescence.

### Step-by-Step Solution:

1. **Definition of Spike**: A spike is a type of inflorescence where flowers are attached directly to the central stem (rachis) without any stalks (pedicels). This means that the flowers are sessile.

**Hint**: Remember that in a spike, flowers are directly attached to the stem.

2. **Flower Arrangement**: In a spike, the flowers are arranged in a linear fashion along the stem. This arrangement can be dense or spaced out depending on the species.

**Hint**: Visualize how flowers are lined up on a stick for a better understanding.

3. **Types of Flowers**: The flowers in a spike can be either bisexual (having both male and female reproductive structures) or unisexual (only male or only female). However, spikes typically contain bisexual flowers.

**Hint**: Think about the reproductive structures of the flowers when considering their types.

4. **Examples of Plants with Spike Inflorescence**: Common examples of plants that exhibit spike inflorescence include wheat, barley, and some species of mint.

**Hint**: Consider common grains or herbs when thinking of spikes.

5. **Comparison with Other Inflorescence Types**: Unlike other types of inflorescences, such as racemes or panicles, spikes do not have pedicels. This is a key distinguishing feature.

**Hint**: Compare spikes with racemes to see the difference in flower attachment.

### Summary:
A spike has sessile flowers that are arranged linearly along the stem, and these flowers can be bisexual or unisexual. Common examples include wheat and barley.