Ghost shrimp and mud shrimp play an active role in:
a. compacting the sediment.
b. reducing species through competition.
c. decomposition of seagrass roots.
d. oxygenating the sediments.
e. consuming marsh plants.
D
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Which of the following types of cells is matched with the wrong stem cell category?
A. embryonic stem cells: pluripotent B. embryonic germ cells: pluripotent C. hematopoietic stem cells: multipotent D. myeloid cell: unipotent E. zygote: totipotent
Familial hypercholesterolemia illustrates incomplete dominance in humans because
A) heterozygotes have an intermediate number of low-density lipoprotein receptors on their liver cells. B) homozygous wild type individuals have an intermediate number of low-density lipoprotein receptors on their liver cells. C) heterozygotes have an intermediate number of low-density lipoprotein receptors on their kidney cells. D) heterozygotes have the minimal number of high-density lipoprotein receptors on their liver cells.
The Panamanian golden frog is in decline because of ________, which are being driven by ________.
A. introduced species; increased global trade B. outbreaks of a fungus; deforestation C. outbreaks of a fungus; global climate change D. outbreaks of a virus; global climate change E. outbreaks of a virus; deforestation
DNA and histones form beadlike globules known as __________.
Fill in the blank(s) with the appropriate word(s).