What is the trophic level of the robin in this food chain? oak tree → caterpillar → robin → fox?

Thick fluid between the nucleus and the cell membrane

What do kingdoms animalia and fungi have in common

During translation, a release factor binds to the ribosome after the ribosome encounters which ofthe following codons? A) AUG B) CCG C) UAA D) UAC E) CAU

What is a control group?

How can a rise in temperature cause a change in a polar ecosystem? A. Sea levels would stay the same B. Sea levels would fall C. Sea levels would fluctuate D. Sea levels would rise

Only homologous characters are useful in constructing phylogenetic trees. True or False

Evidence suggests that the earliest stone tools of early Homo were important for: a. protection from other hominid species b. the systematic hunting and killing of large animals (such as dinosaurs) c.

A stuffed toy with a mass of 0.900 kilograms sits on the edge of a bed at a height of 0.830 meters. If the toy falls off the bed, what will its mechanical energy be at a height of 0.500 meters? (Ignore frictional effects.) A) 0.0 J B) 3.6 J C) 7.

Which of the following is true? A. Some substances must be dissolved in water before they can be used. B. Water is more important to some organisms. C. All organisms obtain water through food. D. Plant cells are unaffected when water is scarce.

These bio-molecules serve many functions throughout the body including signaling molecules, receiving signals, transporting other molecules or ions across the cell membrane, catalyzing reactions, regulating gene expression, and defending the body