All scientific study begins with ________ and the formation of testable hypotheses
Fill in the blank(s) with correct word
observations
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Answer the following statements true (T) or false (F)
1. In mitosis, homologous chromosomes do not pair up. 2. In meiosis, homologous chromosomes pair up, allowing crossing-over to occur. 3. If a human zygote has either 45 or 47 chromosomes, it might be assumed that this was due to nondisjunction. 4. A male having an extra X chromosome (XXY) would have Turner syndrome. 5. A female missing an X chromosome (XO) would have Turner syndrome.
Which of the following does (or did) not lay an amniotic (enclosed) egg?
a. birds b. monotreme mammals c. dinosaurs d. frogs e. snakes
Which of the following provides evidence that mitochondria and chloroplasts were once free-living prokaryotic organisms?
A) They contain nucleoids. B) They contain their own DNA, independent of the nucleus. C) They capture the energy of sunlight to make ATP. D) They produce digestive enzymes on their rough ER.
____ is defined as the transmission of a signal from one animal that influences the behavior of a receiving animal.
Select one: a. Imprinting b. Dominance hierarchy c. Communication d. Circadian rhythm e. Operant conditioning c