Are saber toothed tigers extinct?

Briefly explain how photosynthesis and cellular respiration form a continuous cycle

The DNA found in the nucleus is responsible for directing the synthesis of proteins. What is different about the DNA of different genes that code for different proteins?

The poison cyanide binds to the last complex of the electron transport chain and prevents it from accepting electrons. Assuming this is the only effect of cyanide what will be the primary effect of cyanide on aerobes (cells that require oxygen) ?

PH 6.5, pH 6.0, pH 55, pH 5.0 pH 45 pH 4.0 3 Trout Effect of Environmental Change on Organisms/Populations Question (8.11B): The graph below shows the pH tolerance level for different organisms in a freshwater ecosystem.

a. High risk of death following surgery b. Death from starvation when suffering from cancer c. Deterioration of nutrition status during hospitalization d. Early death during a famine or in a siege e. High risk of developing heart disease

The roots of a plant are usually located underground and composed of which of the following tissue systems?

You are excavating a Native American human burial site which contains both males and females. After obtaining permission from current Native American tribes believed to have descended from these people, you analyze the bones.

Cells that engulf and destroy bacteria

Which did a large earthquake in Alaska initally cause? which did a large earthquake in Alaska initally cause? A. a volcanic eruption B. flooding C. a landslide D. a tornado

What type of asteroid/meteorite do they believe brought some water to the Earth? a. Stoney Iron b. Iron c. Steel d. Carbonaceous Chondrite