Which of the following is true about moss sporophytes?
a.
sporophytes perform photosynthesis.
c.
sporophyttes contain a single spore.
b.
sporophytes depend on the gametophyte for nutrients.
d.
sporophytes are very large.

Mosses are nonvascular seedless plants. Their life cycle has alternation of generation - a haploid gametophyte and a diploid sporophyte. Gametophyte produces haploid gametes which fuse to form a diploid zygote. The zygote grows into diploid sporophyte which produces haploid spores which grow. Sporophyte generation lasts very short and sporophytes depend on the gametophyte for nutrients.

Through the process of elimination:

- Sporophytes do not perform photosynthesis because they lack in chlorophyll unlike gametophytes.

- Sporophytes contain many spores.

- Sporophytes are small.

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.