Multiple choice

Which among the following is not a characteristic of the family plocamiaceae of the algae?

  1. Within the thallus, there is a single, axially located, longitudinal filament called a uniaxial.

  2. The tetrasporangia (the reproductive structures) are zonately divided.

  3. All of the branches are singly arranged at consistent intervals on the main axis.

  4. The thalli of Plocamiaceae algae are directed upward and the fronds are flattened.

  5. The main thallus has a sympodial form.
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A Correct answer
Explanation

Within the thallus there is a single, centrally located, longitudinal filament called a uniaxial. This filament is the chain of apical cells and is therefore the site of main algal growth. The apical cells are larger than the other cells and can be distinguished with a microscope.

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