I think houseplants improve the quality of indoor air.

During the reproduction of a species of mice, a mutation occurs that makes the hair of The Offspring Blend into its environment.

Which of the following best explains the variety of beaks found in finches on the Galapagos Islands?

Which of the following best describes erosion? 1. an increase in wave frequency due to wind 2. the movement of sediment due to wind and water 3. the breaking down of rock or soil 4. a deposition of rock or soil

What is a gene in its simplest form? a segment of DNA a looped portion of RNA a molecule found in the endoplasmic reticulum a part of a protein

What are the three amino acids, in order of formation

you are running an experiment trying to figure out how water affects plant growth for three orchid plants you recently bought. The orchids are the same species and you will place the plants next to eachother in the same windowsill.

The living world is organized in levels. Biotic and abiotic factors also can be arranged into levels of biological organization. Put the words below in order from the least complex to the most complex

Which of the following, when taken up by the cell, binds to the repressor so that the repressor nolonger binds to the operator? A) ubiquitin B) inducer C) promoter D) repressor E) corepressor

Which of these organisms would be a producer? A. fish B. grasshopper C. flower D. snake

A 75 year old man need a replacement heart valve. he lives alone and cares for himself. is a mechanical or biological heart more suited for him