) Plant species that possess heterosporous spore production A) have both male an
ID: 253512 • Letter: #
Question
) Plant species that possess heterosporous spore production A) have both male and female sporophytes ave both male and female gametophytes C) have bisexual gametophytes D) have both (A) and (B) above E) do not exhibit alternation of generations Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated 1. sporophyte dominance, gametophyte independence 2. sporophyte dominance, gametophyte dependence 3. gametophyte dominance, sporophyte dependence A)1 ->2->3 C)2->1 ->3Explanation / Answer
15. Plant species that possess heterosporous spore production
Ans: Option B. Both male and female gametophytes
Heterosporous plants have different spores produced from male and female gametophytes. Microspores develop into male gametophytes where as megaspores develop into female gametophytes
Other options:
Option A, is wrong since heterosporous plants do not produce male and female sporophytes
Option C is also wrong as there are no bisexual gametophytes while option E is wrong because alternation of generation occurs in heterosporous plant species
16. Answer is option E. 3---->1----->2
The evolutionary trend in plants is gametophyte dominant to sporophyte dominant. Large and independent gametophyte to small and dependent. Motile sperm to non motile sperm. Homosporous life cycle to heterosporous life cycle that fits the description which is mentioned in option E.
Hence, option E is the correct answer. Remaining options do not fit into the descriptions, hence cannot be correct answers
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.