Which of the following best supports the idea that the atmosphere of early earth contained no oxygen?

Which of the following is a response? A. a horse swishing its tail at a fly B. a loud clap of thunder C. a puddle drying up D. a seed being planted

A puppy's cells have two sex chromosomes that are the same A homozygous dominant B homozygous recessive C heterozygous D female E male

Which takes places as a result of double fertilization in an angiosperm?

A spore stalk grows from the gametophyte of a moss. What is the next step in its life cycle? A) Gametophyte B) Meiosis C) Gametes D) Mitosis

How is drilling samples evidence of sea floor spreading?

Look at the ocean system described below. plankton - - - > sardines - - - > swordfish - - - > shark What will most likely happen to this ecosystem if the swordfish are killed by a virus? A. The shark population will decrease. B.

Complete the word association: Small intestine is to nutrient absorption as blood is to nutrient A. translation. B. regulation. C. distribution. D. elimination.

Which of the following correctly provides an example of the hierarchical structure of living organisms? A. Organisms that live in the ocean, as opposed to on land, have developed different ways to obtain oxygen. B.

What is the name of a long chain of amino acids strung together? Select one: O a. Polysaccharide b. Polypeptide c. Peptide sandwich O d. Polymorphism Check

For Ryan to meet his grain requirements, which group of foods would be his best choice in a single day?