Which radioisotope is used as a tracer in nuclear scanning?

carbon - 14

uranium-238

technetium-99m

iodine-129

1. Is it true that dominant phenotypes are always the most common in a population? Explain your answer

Which of these provides support and protection for many insects? A) exoskeleton b) spinal cord C) muscle D) skeleton

How would a biologist classify the plant stem shown

Animal cells have all of the following except A. mitochondria. B. chloroplasts. C. a nucleus. D. Golgi apparatus.

If saffron made by yeast is a success and becomes available commercially in the u. s. as vanilla made from yeast is expected to, it will likely be referred to as what?

Which of the following does NOT represent an adaptation that would lead an organism to be successful? A. A wolf in a cold environment growing a thicker coat of fur. B. A caged chicken developing a longer wingspan. C.

What are the 3 things plants must be able to do

Ranchers historically have used genetics to produce new varieties of cattle. buffalo can tolerate both hot and cold temperatures but have meat that is not as tasty and tender as beef.

What is the term for a structure that has no use in an organism

Which phrase describes radiation? transfer of heat by the actual movement of warmed matter transfer of heat between two objects that are touching the process in which energy is emitted by one object, transmitted through space, and absorbed by