Hematopoietic stem cells are _________
A. Pluripotent
B. Totipotent
C. Unipotent
D. Multipotent
D
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In chickens, both males and females inherit autosomal genes that control the ability to lay eggs but only hens (females) actually lay eggs. This is an example of a _______________ trait.
a) sex-limited b) sex-linked c) sex-influenced d) maternal influence effect
Which of the following threats to biodiversity is involved in the majority of the cases?
a. habitat loss b. global climate change c. introduction of exotic species d. overharvesting
The process that produces mRNA from DNA is called
A. transcription. B. translation. C. replication. D. processing. E. post-translational modification.
Which of the following statements is correct?
A) Prokaryotic cells and eukaryotic cells evolved at the same time. B) Prokaryotic cells evolved a lot earlier (over a billion years) than eukaryotic cells. C) Eukaryotic cells evolved a lot earlier (over a billion years) than prokaryotic cells. D) Scientists do not have any evidence on whether prokaryotic or eukaryotic cells evolved first.