The gametophyte stage of the plant life cycle is most conspicuous in __________.

In mosses, haploid __________ directly produce buds that grow into gametophores.

Which structure of a bryophyte sporophyte is specialized for gradual spore discharge?

In which bryophyte structure specifically does a zygote develop into an embryo?

Sphagnum is a __________ that forms extensive deposits of partially decayed organic material.

What does it mean to say that a signal is transduced?a. The signaling molecule enters the cell directly and elicits a cellular response.b. The signal is generated by the production of proteins.c. The physical form of the signal changes between the outside of the cell and the inside.d. The signal is amplified.

Suppose an efficient conducting system evolved in a moss that could transport water and other materials as high as a tall tree. Which of the following statements about 'trees' of such a species would not be true?a. Spore dispersal distances would probably increase.b. Females could produce only one archegonium.c. Unless its body parts were strengthened, such a 'tree' would probably flop over.d. Individuals would probably compete more effectively for access to light.

Summarize the experimental evidence in sponges showing that animal cells adhere to each other selectively. Explain the molecular basis of selective adhesion.

What is the significance of the observation that many signal transduction pathways create a network, where they intersect or overlap?