In multicellular organisms, higher levels of organization result from specific interactions of smaller units. Which of the following is an example of this type of interaction?

Only the most violent volcanic eruptions feature A. magma B. pyroclastic flow c. tephra D. cinder cones

Which causes a drop in female hormone levels? the onset of the menstrual flow if an egg is released from the ovary if the uterine wall thickens if the egg is not fertilized

Which situation most likely involves the hormone gibberellin? the onset of winter dormancy the growth of top-located buds the development of new seedlings the response of a plant to gravity

For each pair of terms explain how the meanings of the terms differ. 1. diffusion and osmosis 2. active transport and passive transport 3. endocytosis and exocytosis

Most ocean water is located in which zone? surface zone transition zone deep zone mixed zone

Which of the following statements is not true? Essential nutrients can be synthesized by the body. Vitamins are required in small quantities for bodily function.

Trees have active transport, why?

The question is how many chromosomes are in the sperm cells, and how many chromosomes will it's zygote have.

Recent research has found that on one island of the Galapagos two finch species interbred. This interbreeding may have resulted in a hybrid species that ultimately led to the extinction of one of the species Darwin discovered.

Which of the following statements about internal membranes in eukaryotic cells is false? a. In eukaryotic cells, internal membranes standardize the internal environment of all cellular organelles. b.