Which factor is NOT responsible for the increase in the size of human population?
A. Clothing
B. Medicine
C. Sanitation
D. Innovations in agriculture
E. Increased total fertility rate
Answer: E
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The release of factors by cells that influence the activity of nearby cells is referred to as:
A. autocrine signaling. B. paracrine signaling. C. pheromonal signaling. D. electrical signaling. E. endocrine signaling.
An animal with an open circulatory system
a. lacks a continuous network of blood vessels that contain the blood at all times. b. can have only one heart. c. has two separate vascular circuits. d. is able to distribute substances faster than a closed system. e. can grow larger than one with a closed circulatory system.
The ____ generation is dominant in mosses, as it can live independently
a. haploid sporophyte b. haploid gametophyte c. diploid sporophyte d. diploid gametophyte e. triploid sporophyte
Which of the following would likely not contribute to the surface area available for water absorption from the soil by a plant root system?
A) root hairs B) endodermis C) mycorrhizae D) fungi associated with the roots E) fibrous arrangement of the roots