During the mesozoic era the earth is warm, so warm that there are no ice caps. sea levels are lower, leaving different types of land masses for life. what is true about life on earth at this time?
a. large mammals appeared
b. arrival of amphibians
c. fish emerged during this time
d. reptiles become the most abundant animals

During the mesozoic era the earth is warm, so warm that there are no ice caps. sea levels are lower, leaving different types of land masses for life. what is true about life on earth at this time?  

a.large mammals appeared  

b.arrival of amphibians  

c.fish emerged during this time  

d.reptiles become the most abundant animals

d is the answer

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.