1. a)How does the sperm come in contact with frog eggs?
b)The sperm is placed on top of the eggs
c)The sperm is carried through a reproductive system
d)The sperm is carried to eggs via water

2. Where do mammal babies develop?
a)Inside the father
b)In an egg underground
c)Inside an egg above ground
d)Inside the mother

1. When a sperm cell and egg cell join together what is it called?
a)baby
b)sperm
c)Zygote
d)Gamete

The frequency of a given region of the electromagnetic spectrum ranges from 3 × 1016 − 3 × 1019 hertz. which type of wave is found in this region? a. x-rays b. ultraviolet rays c. infrared waves d. radio waves

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.