________ are small, aquatic pseudocoelomate organisms that have a crown of cilia on their heads.
Fill in the blank(s) with the appropriate word(s).
Rotifers
Rotifers are small, aquatic pseudocoelomate organisms that have a crown of cilia on their heads.
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Which of the following statements is not true about phloem transport of sugars?
A. Active transporters move the sucrose into the phloem. B. Removing sugars from phloem increases turgor pressure at the sink. C. Increased sugar concentration causes water to flow into the sieve tube. D. Sugars are transported out of the phloem at the sink. E. Loading of sugars at the source is powered by ATP.
What is the difference between active and passive transport?
a. Passive transport is the movement of materials when the cell is resting rather than when it’s active. b. Passive transport is a pre-expiration activity performed by cells at the end of the cell cycle. c. Active transport, unlike passive transport, requires energy because the movement of materials is against the concentration gradient. d. Active transport moves materials across the membrane, but passive transport retains them on the cytoplasmic side only.
Suppose you are given a set of regression results on the role of a random treatment assignment experiment on the effect of an ad campaign on consumers' willingness to buy your product. The regression results report an R-squared of 0.04. How should you value the regression results?
A. Highly, despite the low R-squared it is likely the effect estimated is causal and valuable for active prediction. B. Highly, the R-squared value is still high enough to justify that the effect is causal. C. Not highly, the implied correlation of the R-squared is too low. D. Not highly, the R-squared is far too low.
Which component of the lower respiratory tract is incorrectly matched with a function or description?
A) alveoli: site of gas exchange B) lungs: contain the alveolar sacs C) bronchi: direct air to the lungs D) bronchioles: have ciliated mucous membranes E) larynx: contains the mucociliary escalator