Comparable to angiospersm, which of the following algae exhibits diplontic life cycle ?

Options

A. Spirogyra
B. Ectocarpus
C. Polysiphonia
D. Fucus

Answer

To answer the question "Comparable to angiosperms, which of the following algae exhibits a diplontic life cycle?", we need to follow these steps:

### Step 1: Understand the Diplontic Life Cycle
- A diplontic life cycle is characterized by the organism spending the majority of its life in a diploid state (2N). This means that the organism is primarily in the sporophytic stage, where it has two sets of chromosomes.

### Step 2: Identify the Key Features
- In this life cycle, the diploid organism (sporophyte) produces haploid gametes (1N) through meiosis. The gametes then fuse during fertilization to form a diploid zygote, which develops into the sporophyte.

### Step 3: Compare with Angiosperms
- Angiosperms (flowering plants) exhibit a diplontic life cycle where the dominant phase is the diploid sporophyte. The gametophyte stage is reduced and dependent on the sporophyte.

### Step 4: Examine Algal Groups
- Algae, in general, can exhibit various life cycles, including haplontic (dominant haploid stage) and diplontic (dominant diploid stage).

### Step 5: Identify the Algae with Diplontic Life Cycle
- Among the algae, Fucus is known to exhibit a diplontic life cycle. In Fucus, the sporophyte is the dominant phase, and it produces male and female gametes.

### Conclusion
- Therefore, the algae that exhibits a diplontic life cycle comparable to angiosperms is **Fucus**.

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