What is the seed a crucial development in plant evolution?
a. the seed ended the plants dependency on water
b. the seed protects the embryonic plant until conditions
c. the seed allowed plants to grow thicker and taller
d. the seed protects the male and female gametophytes so fertilization can occur

a. the seed ended the plants dependency on water

Explanation:

Seeds are the structures with a protective seed coat and carry the embryo along with stored nutrients in it. The evolution of seed habit in plants allows them not to depend on water for reproduction.

The seedless plants require water as a medium to bring their gametes in the vicinity for fertilization. On the other hand, seed plants such as gymnosperms and angiosperms produce pollen that carry the male gametes to a great distance with the help of natural pollinating agents.

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.

the answer for this question would be d. glaciers