Why can a lunar eclipse only occur during a full moon

Which of the following is an environmental cost of agriculture? A) Cash crops B) Agronomy C) Crop rotation D) Pollution

Organisms can survive at various pH levels. This table shows the minimum pH level at which certain aquatic organisms can survive. The overall effect of acid rain reducing the pH of this aquatic ecosystem to 5.

Compare and contrast bacteria and animal and plant cells

Why scientist use si instead of units such as gallons and inches

Which stages make up interphase of the cell cycle?

DNA is genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes.

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white

The green stem ant has three (autosome) chromosomes. During meiosis, chromosome 1 and 3 separate normally, but chromosome 2 homologs do not separate during meiosis I. Meiosis II happens normally. What will the resulting cells of meiosis look like?

A population is growing at a rate of 2,4,8, 16, 32. Which type of growth does this describe?

Which epithelial tissue type is most often found lining large ducts, such as those of the salivary glands or pancreas?