If the half-life of a radioactive isotope is 5,000 years, how many grams of the radioactive isotope in a specimen will be left after 10,000 years if you start off with 100 grams of the radioactive isotope?

Cats normally have a total of 18 toes, 5 on each front paw and 4 on each back paw. But some cats express the dominant phenotype for polydactyly, which results in the development of extra toes on one or more paws.

A scientist is studying a biome that experiences large seasonal fluctuations in both temperature and precipitation patterns.

What substance is a powerful contributor to weathering and erosion on Earth? A) wind B) oxygen C) carbon dioxide D) heat

Emit red and blue what will it look like

What has caused the greenhouse effect to become imbalanced? * O More plants on earth O A hole in the ozone O Burning more fossil fuels

What is a function of the backbone in animals? A. It protects against predators. B. It regulates blood glucose. C. It surrounds the spinal cord. D. It limits movement.

Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive).

The process when organisms reproduce, they pass their characteristics on to their offspring.

True or false? resource use per person is higher in the united states than it is in middle-income countries like china.

A chunk of an asteroid that has broken off in outer space is called a