__________ provide much of our lumber for building and wood pulp for paper production.
Fill in the blank(s) with the appropriate word(s).
Answer: Gymnosperms
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What is an organic compound?
A. A molecule that contains a nitrogen skeleton B. A molecule that contains both carbon and nitrogen C. A molecule that contains carbon bonded to other elements D. A molecule that contains nitrogen bonded to other elements
Animals in the largest phylum are _____
1.bilateral protostomes 2.unsegmented with a pseudocoel 3.jointed with an exoskeleton 4.segmented with circulatory and digestive systems in all chambers of the coelom
Each enzyme has a particular substrate because enzymes
What will be an ideal response?
Which one of the following is not an adaptation shown by modern birds?
A. A respiratory system that allows all of the air to pass through the lungs in one direction B. Wings and a long feathered tail C. Modified beaks and feet to support feeding behavior D. Complete division of the heart into right and left halves E. Endothermy