What is a primary source of the nutrients that fuel harmful algal blooms (HABs)?
A. Fertilizer
B. Climate Change
C. Oil spills
D. Acid Rain
Answer: A. Fertilizer
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A spontaneous, inheritable change in an organism's genes is called a ____
A) mutation B) selection C) prokaryote D) genus
Due to the arrangement of weaker bonds in their crystal lattice, the tendency of certain minerals to break along smooth, parallel planes is known as ________
A) streak B) cleavage C) luster D) crystal habit
The most common minerals found in soils are combinations of which four elements, which are also the most common elements in Earth's crust?
a. carbon, hydrogen, oxygen, nitrogen b. silicon, aluminum, oxygen, iron c. potassium, zinc, copper, iodine d. silicon, hydrogen, oxygen, nitrogen e. carbon, aluminum, iron, potassium
Read carefully through the paragraph below, and decide which of the options is correct. A shallow sea existed in North America approximately 425 million years ago
This ancient geography was interpreted based on the sedimentary rocks in the region of that age. Mudstone, limely shale and shaley sandstone mark the location of the shallow sea. Sandstone occurred near the ancient shoreline and conglomerate occurred near the source area. Clasts of volcanic and plutonic rocks in the conglomerate imply the uplift and erosion of igneous rocks of nearby mountains. A) The word "igneous" should be replaced by "metamorphic". B) The word " mudstone" should be replaced by " limestone". C) The word "shale" should be replaced by " sandstone". D) The word " shallow" should be replaced by "deep".