When you notice something using your sense of smell, taste, touch, sight or hearing you are making which of the following?

A. A hypothesis

B. An experiment

C. A conclusion

D. An observation

Smallpox is a disease caused by a specific virus, while the common cold can be caused by over 100 different viruses.

Which sequence best describes the passage of sperm? 1. Seminiferous tubules. 2. Vas deference. 3. Epididymis 4. Ejaculatory duct 5. Urethra. A. 3,1,2,4,5 B. 1,3,2,4,5 C. 5,4.2,3,1 D. 1,3,4,2,5 E. 3,1,4,2,5

What happen in medals experiments when a pea plant received two different alleles for the same trait

The organisms that form the base of most open-ocean food webs are a. fish. b. coral. c. plankton. d. kelp.

A dialysis machine can be used to remove waste from a patients blood. Which human body system works in a similar way?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.