What is the role of krill in the Antarctic food web?

What is one way intensive agricultural practices contribute to climate change? O A. Certain methods of plowing release greenhouse gases. B. Livestock manure absorbs greenhouse gases. O O C. Fewer trees are available to replenish petroleum stores.

Which statement is true about Earth′s layers? A. The crust is the least dense layer. B. The mantle is the least dense layer. C. The inner core is the least dense layer. D. The outer core is the least dense layer.

What is the solution set of the quadratic equation x^4-x^2-2=0

The process of natural selection 1. is possible only when spontaneous mutations are forced by environmental pressures 2. is fundamentally a natural process that operates independent of the condition of the environment 3.

This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, which of the following statements is true? This pedigree chart shows three generations.

Why is potassium able to diffuse easily in and out of cells? because potassium has a greater concentration in the intracellular fluid (icf) because sodium has a greater concentration in the extracellular fluid (ecf) because the resting plasma

The process of two species changing genetically in response to long-term interactions with each other is called

The cones of the jack pine (pinus banksiana) are serotinous, only opening when exposed to intense heat. this is an example of

Which of the following is true of fungi? A. Like plants, they carry out photosynthesis. B. Like some prokaryotes, they are autotrophic C. Like animals, they lack cell walls. D. Like protists, they are eukaryotic.

Both salmon and the grizzly bear are? a) producers b) consumers c) decomposers