Match each term with the correct description (1 answer for each 5-pts).  I. Marl II. Peat III. Thin-green periphyton (algae) IV. Thick blue-green periphyton (algae) V. Cattails a. Soil that is a product of periphyton which oxidizes and leaves behind calcium carbonate particles; a light colored soil b. Grows in acidic/soft water with little dissolved calcium c. Grows in hard-water areas with abundant calcium from contact with limestone bedrock d. Marsh species that are common in areas of higher levels of nutrients or soil disturbance e. Soil that is a product of long-hydroperiod wetlands and is composed of organic remains of dead plants

List and define the three different type of binary stars. 

Accounting for over half of all deforestation in tropical regions is the ________.

Pulsars are pulsating variable stars.  

Complete removal of the forest canopy is ________.

An absorption spectrum is seen when light from a self-luminous object passes through a cool gas.

A site of protostar formation is a giant molecular cloud.

Solve the problem.A company finds that its marginal revenue from the sale of the xth unit of its product is given by   Assuming that  find the total-revenue function R.

Find the integral.dx

What is the name  when you see a v shape indentation of the lower lid when the patient looks down: