What trends occurred in the size of the sporophyte and gametophyte generations as plants became adapted to life on land? How can these trends be explained?
What will be an ideal response?
Answers may vary. As plants adapted to the terrestrial environment, the gametophyte was reduced in size and the sporophyte was increased in size. In other words, the sporophyte became more dominant as the gametophyte became less conspicuous. The shift from dominance of the gametophyte to dominance of the sporophyte occurred as plants adapted to life on land and vascular tissue evolved. Vascular tissue transports water, minerals, and organic molecules easily throughout the plant, thus allowing the organism to increase in size but still receive nutrients in all cells. The small size of the nonvascular bryophytes is also due to their flagellated sperm and the need for water for sexual reproduction to occur.
You might also like to view...
Which of the following is true about the cell-wall-less archaeal genus Thermoplasma?
A. They are spherical at temperatures below 59°C. B. They are spherical at temperatures below 59°C and they are filamentous at temperatures at 59°C and higher. C. They are filamentous at temperatures at 59°C and higher. D. They are non-motile.
The radius and ulna are considered to be part of
a. both the axial skeleton and the appendicular skeleton. b. the axial skeleton. c. neither the axial skeleton nor the appendicular skeleton. d. the appendicular skeleton. e. the adaxial skeleton
You discover an organism that is eukaryotic, unicellular, and photosynthetic. Based on this evidence, to which group
would you assign this organism? a. domain Bacteria b. protist group c. kingdom Fungi d. kingdom Plantae e. domain Archaea
The antimicrobial effects of AMPs include all of the following EXCEPT
A) inhibition of cell wall synthesis. B) lysis of bacterial cells. C) destruction of nucleic acids. D) pore formation in bacterial membranes. E) inhibition of phagocytosis.