Thorium 234 has a half life of 24 days. If you started with a 100-g sample of thorium-234, how much would remain after 48 days?

Which animal is more closely related to the caiman the parrot or hare?

What type of resource is sunlight? A - recyclable only B - renewable C - nonrenewable D - recyclable and renewable

Which of the following statements is true : A. In mutualism only one species benefits from cooperation, B. mutualism is a special type of interspecies competition C. Growing large root systems is one way plants compete for water, D.

The diagram below represents two cells viewed using the same magnification with the same microscope. One possible conclusion that can be drawn about the activity of these two cells is that

Nikhil asked 120 randomly chosenmoviegoers to watch a clip of an upcoming movie and choose the best title. The title "Everything" was chosen by 36 of the moviegoers as the preferred title.

An energy transformation is the same as energy what?

How are nerve cells adapted to carry electrical messages?

If B is dominant for brown eyes and b is recessive for blue eyes, write the genotype and phenotype shown for #1-3. 1. Homozygous dominant 2. Homozygous recessive 3 Heterozygous

Photosynthesis removes A: oxygen from the atmosphere and puts it in food B: sunlight from the earth C: carbon from the atmosphere and puts it in food D: pollution from the atmosphere

For an object to remain at rest, which of the following must be true?