A plant will begin flowering in response to changes in length of daylight, temperature, and light quality. This is an example of which unifying principle of life?
A. Living organisms interact with their environment.
B. Populations of organisms evolve from one generation to the next.
C. Living organisms maintain homeostasis.
D. Living organisms grow and develop.
E. Plants conduct photosynthesis.
Answer: A
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During weeks 5 - 6 which major structural feature is present on the developing embryo?
a. Stubby tail b. Pharyngeal arches c. Lower limb buds d. Umbilical cord e. Distinct fingers and toes
Which of the following features distinguishes all hormones from neurotransmitters?
A. Hormones require large concentrations to have an effect, while neurotransmitters require only low concentrations. B. A hormone affects reproductive functions, while neurotransmitters control all other processes. C. Hormones travel via the blood to a target tissue, while neurotransmitters cross the synaptic cleft to a postsynaptic cell. D. Hormones are steroids, while neurotransmitters are amino acids.
The descending limb of the nephron loop
A) is not permeable to water. B) responds to high levels of antidiuretic hormone (ADH) in the blood. C) is permeable to salt and urea. D) loses water to the medulla as the filtrate becomes more concentrated. E) pulls water from the renal medulla to make the filtrate more dilute.
Please match the technologies with the statements that most accurately describe them to test your understanding of the methods and characteristics used in classifying bacteria. These tests use DNA to determine the identity of an organism
A) Morphology B) Bacterial physiology/biochemistry C) Serological analysis D) Genetic techniques