Above is a cross-section of a potato. Certain structures have been labeled to help you identify them. Based on the structures you see and their locations in the potato, you can conclude that a potato is a modified _______.

Acid rain can cause soil acidification. Plants that are exposed to acid rain often have stunted growth and show symptoms of nutrient deficiency. What is the primary reason acid rain has these negative impacts on plants?

Which of the following can be considered an adaptation that facilitates sexual reproduction of animals in dry, terrestrial conditions?

How does a muscle generate force and movement? The interaction between two proteins occurs as [a], generating [b].

How is water-soluble nitrogenous waste in the blood removed from the body at the kidney?

What is the most likely impact that a homeotic mutation would have on an animal?

How does a plant shoot or root grow in length?

Operation of the sodium-potassium pump and contraction of muscles requires a great deal of ATP. Which organelle is responsible for making most of this ATP?

Although every country fighting in the First World War suffered food shortages at various times during the war, in 1917 Great Britain was the last to institute control by rationing bread, primarily because

The abdication of Tsar Nicholas II of Russia in February 1917 was caused by