Which of these is the best indication of the relative age of a rock layer

One of your friends is reading a newspaper article, which notes that, in rats, there is a positive significant relationship between sugar consumption and obesity. the more sugar a rat consumes, the higher its overall body mass.

What type of normal human cell contains 22 autosomes and a y chromosome? what type of normal human cell contains 22 autosomes and a y chromosome? somatic cell of a male sperm cell somatic cell of a female egg cell?

What steps does the cell take to speed the rate of dna replication? (this is middle school science)

1. What are antibiotics?

The equations represent two biochemical processes that occur in living organisms. The letter X represents a molecule produced from process 1.

Fossil records suggest major changes in early vascular plants that favored the evolution of land plants. Which was one of these major changes? Select one of the options below as your answer: A. Development of fruit B. Development of seed C.

Many people in the developing world who depend on rice in their diet suffer from diseases related to deficiencies of

Why does biology have to be a subject

Differential reproduction of genotypes leads to evolution via what process? inbreeding natural selection genetic rescue genetic drift mutational load

Why is carbon essential to all known life on Earth?