In vertebrates, mechanoreceptors are not found in which of the following:
1.skin
2.skeletal muscles
3.walls of blood vessels
4.internal organs
5.all of these structures have mechanoreceptors
5
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Which types of fish have gill slits hidden beneath a gill cover?
a. jawless fishes b. cartilagenous fishes c. bony fishes d. sharks and rays e. lampreys and hagfish
alpha hemolysis
What will be an ideal response?
Which order do salamanders and newts belong to?
A. Urodela B. Apoda C. Edentata D. Chiroptera E. Anura
The strongest evidence that a meteor impact is responsible for dinosaurs becoming extinct is provided by:
A. the detection of high levels of radioactivity in the fossilized remains of dinosaurs from the time period corresponding to extinction B. the presence of significant levels of iridium in the rock layers corresponding to the time of dinosaur extinction C. contamination of fossils from that time period with fragments of rock that penetrated the skeletons of many dinosaurs D. high levels of particulate matter in the lungs of dinosaur specimens perfectly preserved in ice E. none of the above; no evidence supports a meteor impact being responsible for the extinction of the dinosaurs