In addition to sickle-cell anemia, which of the following is associated with abnormal hemoglobin production?
1.aplastic anemia
2.pernicious anemia
3.hemolytic anemia
4.thalassemia
5.iron-deficiency anemia
4
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What is a major difference between mitosis and meiosis I in a diploid organism?
A) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I. B) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis II. C) DNA replication takes place prior to mitosis, but not before meiosis I. D) Only meiosis I results in daughter cells that contain identical genetic information.
What is the first event in the fossilization process?
A. erosion of soils around the organism B. burial of the organism by sediments C. conversion of organic tissue to minerals (rock) D. hardening of sediments in to rock
Artificial hearts are used routinely today to replace damaged hearts when a donor heart is not available for transplant
Indicate whether the statement is true or false
Of all of the species of organisms that have ever existed on Earth, it is estimated that about _______ percent have gone extinct.
A. 10 B. 50 C. 75 D. 99 a. true b. false