Neuroglia cells that have lipid-rich cell membranes and form insulating sheaths of myelin are called
A. adipocytes.
B. erythrocytes.
C. islets of Langerhans.
D. Schwann cells.
E. mucus cells.
D. Schwann cells.
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What is the root of an evolutionary tree?
A. the tips or ends of the branches that represent the groups being studied B. the node at the base of the tree representing a common ancestor C. a branch point representing an extinct ancestral species common to the two connected branches D. another term for a bifurcating tree E. refers to the length of each branch of the tree
Species that have a delayed reproductive stage, are competing for limited resources, and have smaller numbers of slowly maturing large offspring show ________________ adaptations.
A. K-selected B. r-selected
Which of the following are NOT eukaryotes?
a. fungi b. bacteria c. plants d. animals e. protistans
Hydrolyzing gut bacteria: part of the human genome?
What will be an ideal response?