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bio biology

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
a reflex does not involve   the brain  
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the major function of cell-mediated immunity is to   destroy cancer cells and virus-infected cells  
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steriod hormones   alter the activity of genes  
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during muscle contraction   actin and myosin filaments slide past eachother  
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mammals are unique among all vetebrates because they   have hair.  
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under the biological species concept, the main criterion for identifying a species is   reproductive isolation  
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in the early history of life on earth which is the correct evolutionary sequence   anaerobic bacteria, cyanobacteria, aerobic bacteria  
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a mycorrhiza is a   fungus plant relationship  
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which of the following sets of characteristics would be considered most primitive (i.e. earlist in evolution)   radial symmetry, sac like gut, no cephalization.  
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two populations of organisms that are able to reproduce together but produce sterile offspring are considered   seperate species like the horse and donkey.  
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which of the following pairs of organisms are most closely related in ancestry   bat and whale.  
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consider two species that are members of the same class therefore, they   are also members of the same phylum.  
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what is the difference between an antigen and a antibody?   antigen is a part of the envador, and antibody is produced by the immune system.  
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___ tissues are sheetlike with one free surface   epithelial  
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a ___ connects epithelium to underlying connective tissue   basement membrane  
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most animals have glands derived from ___ tissue.   epithelial  
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the most abundant protein in the human body is ___, made fibroblasts.   collagen  
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___ is mostly plasma.   blood  
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your body converts excess carbohydrates and proteins to fats, which accumulate in ___.   adipose tissue cells  
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___ tissues are the body's most abundant and widely distributed tissue.   connective  
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cell of ___ can shorten (contract)   muscle tissue  
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___ muscle tissue has a striated appearance   skeletal and cardiac  
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___ detects and integrates information about changes and controls responses to those changes   nervous tissue  
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thin cytoplasmic protection from cells called ___ carry signals between your spinal cord and your toes.   nuerons  
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A hydrostatic skeleton consists of   a fluid in an enclosed space  
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bones are   mineral reservoirs, skeletal muscle's partners, and sites where blood cells form (some bones only).  
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the human backbone   consists of vertebrae and intervertebral cartilage disks, has a shape adapted to upright walking, and enclosed the spinal cord.  
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