Long dry spells make the release of sperm and eggs into the environment an unreliable reproductive mechanism.
which possible adaptation addressed this problem and allowed plants to thrive on land?

a. structures developed that protecting developing eggs and sperms
b. adaptions to aquatic life developed over time
c. root structures developed that maintained a hold on land
d. cellular structures developed that stored excess starch and sugar

Grade 91.)the gravitational pull from the moon words).2.) what is the rate of gravitational 3.)if you drop a hammer, is it more likely to drop handle side down, head side down, or equal chance that it will land either way? why? 4.)a car moves 60km east and 90km west. a.) what is the distance the car traveled? b.) what is the car's displacement5.)what is the average velocity of a car that moved 60 km south in 3 hours? 6.) a car starts from rest and acceleration to 60 m/s over a time of 5 seconds. what is the acceleration of the car? 7.)what is the speed of an object at rest?