REVIEWING YOUR KNOWLEDGE 1. Complete Table 3, indicating the ancestral and deriv

Question

REVIEWING YOUR KNOWLEDGE 1. Complete Table 3, indicating the ancestral and derived features of seedless vascular plants relative to success in land environments. Recall that in this context, the term ancestral refers to a trait shared with a group of common ancestors, for example, the bryophytes. The term derived indicates a trait that has arisen more recently, for example, in the seedless vascular plants. Traits shared with the bryophytes (such as sperm requiring water for fertil- ization) are ancestral, whereas the presence of vascular tissue is derived TABLE 3 Ancestral and Derived Features of Seedless Vascular Plants as They Relate to Adaptation to Land Ancestral Features Derived Features

Explanation / Answer

1) Sperms requires water for fertilisation

2) These plants can be produced by various plants of asexual spores of only one kind.

3) Reduced gametophyte but usually independent

1) Vascular tissue

2) Independent sporophyte, and the stomata is complex.

3) These plants are produced by the spores of two different sexes of sporophytes of land plants

Ancestral features of seedless vascular plants Derived features of seedless vascular plants

1) Sperms requires water for fertilisation

2) These plants can be produced by various plants of asexual spores of only one kind.

3) Reduced gametophyte but usually independent

1) Vascular tissue

2) Independent sporophyte, and the stomata is complex.

3) These plants are produced by the spores of two different sexes of sporophytes of land plants

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