Apoptosis through the extrinsic pathway is activated by factors such as lack of oxygen or growth factors.
Answer the following statement true (T) or false (F)
False
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For Mendel’s explanation of inheritance to be
correct, a. the genes for the traits he studied have to be located on the same chromosome. b. the combination of gametes at fertilization has to be due to chance. c. genes cannot be transmitted independently of each other. d. only diploid organisms demonstrate inheritance patterns. e. none of these apply.
Which of the following is NOT a function of the lymph vascular system?
a. collecting water and solutes from blood capillaries b. picking up fats absorbed by the small intestines c. being a major site for T and B cell activation d. transporting foreign materials to lymph nodes e. returning water and solutes to general circulation
One cell sends second messengers to another cell through gap junctions. What type of signaling would this be considered?
A. paracrine B. autocrine C. endocrine D. direct contact E. synaptic
Why do many plants use the photoperiodic pathway to regulate the timing of flower formation?
A. This allows plants to link flowering to day length, which corresponds to the season when conditions are optimal. B. Flower petals carry out high levels of photosynthesis and require high light conditions. C. A minimum amount of light is always necessary for flowering. D. This allows plants to link flowering to temperature, which corresponds to the season when conditions are optimal.