Shiga toxin kills cells by preventing protein synthesis
Indicate whether the statement is true or false
TRUE
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Answer the following statements true (T) or false (F)
1. Freshwater fishes are hypoosmotic. 2. Habituation is a type of learning. 3. Migration only occurs in vertebrates. 4. The main advantage of a territory is that it provides exclusive access to some resource. 5. Only invertebrates show true eusociality.
A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?
A. Physiological ecology B. Ecosystem ecology C. Organismal ecology D. Community ecology E. Population ecology
Fate maps of C. elegans development reveal that all somatic cells of the adult are directly descended from ____
produced during early development.
a. two germ-line cells b. cells of the hypodermis c. five somatic founder cells d. three endodermal cells e. five germ-line cells
Amyotrophic lateral sclerosis (ALS) disrupts
muscle contraction by a. binding actin. b. blocking myofibril. c. killing motor neurons. d. weakening myofilaments. e. none of these.