As lymph passes through the sinuses of lymph nodes, it is filtered by ________ that engulf debris and pathogens.
A. macrophages
B. T cells
C. neutrophils
D. B cells
Answer: A
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Nilsson-Ehle studied the effects of a small number of genes on a particular trait about a century ago, and found that the Mendelian laws of inheritance did not apply
A. true B. false
Which of the following is not something that causes guard cells to close?
A. too little water in the leaf B. too much CO2 in the leaf C. presence of abscisic acid D. too little CO2 in the leaf E. too much water vapor outside the leaf
Prior to the divergence of animals, an ancestor is proposed to have developed the key shared trait of all animals, the
A. body form of multicellularity. B. presence of a mouth by which to consume nutrition materials. C. ganglia or brain cells to control all motion. D. embryonic development of the mouth first, from embryonic cells. E. body form of having true tissues.
This is a water-soluble hormone derived from the nervous system that regulates blood volume and blood pressure.
A. aldosterone B. antidiuretic hormone C. cortisol D. adrenocorticotropic hormone E. oxytocin