Which organelle can be compared to a security guard who decides whom may enter a building and whom may not?

A: cell membrane

B: cytoplasm

C: endoplasmic reticulum

D: mitochondrion

In which situation does the biosphere or hydrosphere cause a chemical change to the atmosphere? A. Density currents in the ocean transfer heat that warms the atmosphere. B. Photosynthesis by oceanic algae removes carbon dioxide from the atmosphere.

Why must all three aspects of science be addressed in a successful science education program?

It is best say that most human sources of air pollution result from

In real life, why do some individuals have higher biological fitness (produce more offspring) than others? Give two (2) examples

The human body will start to sweat when it is overheating. The purpose of sweating is to cool the body down. This scenario would be classified under which Theme of Biology?

Some populations of bats live in areas with high levels of noise pollution, such as near heavily trafficked bridges. How might the hunting behavior of bats be affected by such an environment?

Which best describes the relationship between blood flow and lymph flow? A. Blood flows through the contraction of skeletal muscle, and lymph flows through the contraction of cardiac muscle. B.

What is one example of a primary succession

What are biological terms in order from least to greatest

In vertebrates, the speed of transmission along neurons is much faster in myelinated neurons compared to unmyelinated neurons. Which of the following is not true of transmission along myelinated neurons? A.