Which of the following is true about bryophytes?

Bryophytes differ from Thallophytes in which of the following?

Consider the following statements:
$I.$ The plants have a magnificent property of retaining water. They can withhold water $200$ times more than their own weight. Hence,they are widely used by gardeners to keep cut plant parts moist during transportation and propagation.
$II.$ These plants grow as semiaquatic or submerged in acidic marshes. The older portions of the plant die but do not decay due to peculiar germicidal properties.
The above statements belong to which of the following bryophytic plants?

What is the dominant phase of bryophytes?

In bryophytes, the first cell of the sporophytic generation is the ...... .

In which of the following plants is the main plant body a gametophyte?