During which phase of meiosis do homologous chromosomes align as tetrads in the middle of the spindle?

a. prophase 1

b. prophase 2

c. metaphase 1

d. metaphase 2

What must the genotype look like for an organism to show a recessive trait?

Choose the best answer. All living things are: a) evolving b) made of stuff c) made of cells d) unrelated

How do shore crabs survive wave action

What are the seven stages of the water cycle and what does each stage entail?

3. Which of these is true about inherited traits? A. Traits always follow simple patterns of inheritance. B. Traits may be determined by multiple genes. C. All traits are inherited from only one parent. D. Every trait is controlled by only one gene.

Under what conditions will the body use significant amounts of protein for energy during exercise? a. Inadequate calorie intakeb. Inadequate calorie intake and inadequate carbohydrate storesc. Inadequate carbohydrate storesd. Inadequate fluid intake

Which of the following is a true statement about hypotheses? A. It is not possible to test hypotheses through scientific investigations. B. Even if hypotheses are not supported by data, they can still be valuable. C.

A homozygous recessive female mates with a heterozygous male. What percentage of the offspring could be homozygous dominant? a. 50% c. 0% b. 100% d. 25%

Which best describes the vulva? a) It is a muscular organ where a developing offspring grows. b) It is the external part of the female genital organs. c) It is the birth canal of the female reproductive system.

The diagram shows a simple lipid. What type of lipid is shown? saturated unsaturated phospholipid triglyceride