Which best describes a gene?

O A. A tetrad

O B. A piece of a chromosome

O C. A sister chromatid

O D. A chromosome

Study the diagram of the two animals. Which statement best describes the animals? Animal X begins life as a tadpole, and animal Y begins life as a larva that looks like the adult.

Give several examples of what could happen such that a persons phenotype for a trait fails to match his genotype for that trait

The transfer of energy from one organism to the next in an ecosystem begins with a producer. A producer is an organism that produces its own food.

What causes interstellar dust and gas to start to contract and form a protostar?

Which rain gauge would be least accurate for measuring heavy rainfall?

At the end of meiosis 2, How does the DNA in each of the four new cells compare to the DNA from the original cell?

How fast molecules are moving?

Explain the four main characteristics of hazardous waste.

The physical interaction between the respiratory and the cardiovascular system takes place at which respiratory structure in a human? a, brochioles b. alveoli c. bronchi d, respiratory vessels e, gill filaments

How do our bodies get glucose and other organic molecules fir cellular respiration