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.
1.TRUE
2.TRUE
3.TRUE
4.FALSE
5.TRUE
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Which of the following is NOT a true
statement about the evolution of immunity?
a. immunity evolved before there were multicelled eukaryotes b. nonself recognition evolved about 1 billion years ago c. innate immunity evolved out of adaptive immunity d. ways of indentifying “self” evolved after multicelled eukaryotes evolved e. more than one of these statements is NOT true about the evolution of immunity
McArdle's Disease is a rare condition caused by the inability to produce myophosphorylase, which breaks down glycogen. Symptoms include severe muscle pain during exercise. What tissue type is affected in these patients?
A. Cardiac muscle B. Epithelial tissue C. Skeletal muscle D. Smooth muscle
Parallel venation is characteristic of eudicot leaves. Indicate whether the statement is true or false
Which of the following animals has an eye with a single lens?
A) Dragonfly B) Jellyfish C) Human D) Butterfly E) Bee