Two bases of DNA connects the double chain of DNA like a step on a ladder.

True/False

Which biome contains large populations of planf eaters, few species of birds, and deep, rich soil? A) A taiga B) A tundra C) A deciduous forest D) A grassland

A bacterial culture grown in a glucose-peptide medium causes the pH to increase. The bacteria are most likely A) not growing. B) using the peptides. C) fermenting the glucose. D) oxidizing the glucose.

Can H4C2O2 form hydrogen bonds

Which of the following lists the stages of early animal development in the correct order? A) blastula, embryo, gastrula, zygote B) gastrula, blastula, embryo, zygote C) gastrula, blastula, embryo, zygote D) embryo, zygote, gastrula, blastula

Soil is not directly important to animal life.

What predictions can researchers make based on the egg viability hypothesis?

What occurs after a disturbance in primary succession?

A person driving a car applies the brakes. This produces friction, which stops the car. Into which type of energy is the mechanical energy of the car converted

Why do our classification systems change?

Potato plant, which organ is used primarily for food storage rather than food production? A) flower, B) root, C) stem, D) left