__________ is the science of making hypotheses about evolutionary relationships among clades.
Fill in the blank(s) with the appropriate word(s).
Cladistics
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When water activity is low, an organism must
A) increase its internal solute concentration. B) increase its external solute concentration. C) decrease its internal solute concentration. D) decrease its external solute concentration.
Once the plasma membranes of the egg and sperm fuse, the egg completes meiosis II and undergoes a series of changes that prevent ____ , or fertilization by more than one sperm
Fill in the blank with the appropriate word.
Which of the following is not an essential component of the eukaryotic termination and release stage of translation?
A. stop codon in mRNA B. eRF1 C. eRF3 D. eEF2
Calcium is stored and released by the ____
a. T-tubules b. sarcomere c. troponin d. tropomyosin e. sarcoplasmic reticulum