In female mammals, germ cells
A. are not produced until puberty.
B. are arrested in meiosis I until puberty.
C. develop into fully mature gametes before birth.
D. are arrested in meiosis II until puberty.E.
are arrested in mitosis until puberty.
B. are arrested in meiosis I until puberty.
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The enzyme found in mucus that destroys bacteria is ____
a. lysozyme b. peroxidase c. enterokinase d. peptidase e. lactose dehydrogenase
Plants do not benefit from insects that prey on their nectar
Indicate whether the statement is true or false
If a female orchid bee has just left a Brazil nut tree with nectar in her stomach, and if she visits another flower on a different Brazil nut tree, what is the sequence in which the following events should occur?
1. double fertilization 2. pollen tube emerges from pollen grain 3. pollen tube enters micropyle 4. pollination A) 4, 2, 3, 1 B) 4, 3, 2, 1 C) 2, 4, 3, 1 D) 2, 4, 1, 3
Jacobsen syndrome, which can cause heart defects, intellectual deficiencies, and bleeding disorders, is caused by a deletion of the terminal end of chromosome 11. What method could you use to determine whether an individual has Jacobsen syndrome?
A) Look at a person's skin cells in G1 under a light microscope. B) Perform a karyotype using a person's white blood cells. C) Place a person's red blood cells in culture to see if they grow. D) Count the number of chromosomes present.