What is the relationship between observation and explanation

How many genetically different gametes can this cell form

An male animal has a genotype of AaBB. The number of different gene combinations that would be found in the sex cells/sperm of this animal would be: a) 1 b) 2 c) 4 d) 6 e) 8

Which of the following is an environmental factor that can cause an infectious disease? Lack of sleep and rest Lack of nutritious diet Lack of exercise Lack of clean water

What happens in the phloem? a. water moves up from roots. b. food moves down from leaves. c. food moves up from roots. d. water moves down to roots.

Explain how osmosis creates turgor pressure in plants

In Mendel's work with peas, an F1 hybrid (smooth yellow) was crossed to the recessive (wrinkled green) parent type. In terms of color, what were the frequencies of the phenotypes in the offspring of this cross?

Which of the following choices is a goal of sustainable practices? A. They focus on using resources for maximum productivity. B. They focus on using resources that can disappear if overused. C. They focus on using resources that can be renewed. D.

Why are atoms so important?

Which of the following is the best example of homeostasis in the human body? and why?

Dna determines the structure of proteins produce by cells?