____, which are a cell type found in xylem, are extremely efficient in conducting water

a. Sieve tube elements
b. Companion cells
c. Tracheids
d. Sclereids
e. Vessel elements


e

Biology & Microbiology

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Certain complexes of the mitochondrial electron transport chain pump protons. Which of the following best describes the movement of protons in this situation?

A. across the outer mitochondrial membrane, from the cytoplasm to the intermembrane space B. across the outer mitochondrial membrane, from the intermembrane space to the cytoplasm C. across the inner mitochondrial membrane, from the intermembrane space to the matrix D. across the inner mitochondrial membrane, from the matrix to the intermembrane space

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Consider a population undergoing logistic growth. When (K-N)/K = 0, what does that imply about the birth rate (b) and death rate (d)?

A. b > d B. b < d C. b = d D. It is not possible to make an inference about b and d from this information.

Biology & Microbiology

ectotherms

What will be an ideal response?

Biology & Microbiology

In which layer of cells in the eye is light converted into an electrical signal?

What will be an ideal response?

Biology & Microbiology