James Watson and Francis Crick discovered the double helix shape of DNA. They based their work on that of Rosalind Franklin who also saw a helix shape when he took images of different DNA proteins.
I believe a peccary is a placental because its fetuses are fed via placenta.
The layers of the atmosphere filter UV rays from the sun to decrease solar radiation. Therefore, the answer is B.
The answer is true since the moon slowed its rotation so that the moon rotates with the earth
full moon from the earth is when the moon is fully lit up or in onther words the earth it not blocking the sunlight from hitting the moon and reflecting to earth
this is when the order is sun earth moon and the relfecting part is facing to the earth so therefor the side of the astronaught is lit up