Hydrogen bonding helps salamanders cling to different surfaces. Which of the following surfaces would a salamander have trouble sticking to? Oa polar surface a nonpolar surface none of the above a damp surface
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A hydrogen bond is formed when hydrogen is covalently bound to another atom which is more electronegative that acts as an electron donor and another electronegative atom having lone pairs of electrons which acts as a hydrogen bond acceptor.
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- If you got rid of the endostyle of an ascidian, what is most likely to occur? A. no gas exchangeB. it would starveC. mucous net wouldn't be spread across gill slitsIn 1798, a stuffed platypus specimen was delivered to the British Museum. Reports that it laid eggs created much confusion. To modem biologists, a platypus is clearly a mammal. It has fur and the females produce milk. Young animals have typical mammalian teeth that are replaced by hardened pads of the bill as the animal matures. Why do you think modem biologists can more easily accept that a mammal can have some reptilelike traits than scientists who were considering this animal in the late 1700s?A bird's keratin-lined _______ helps it grind up food. a. pharynx b. crop c. gizzard d. gastrovascular cavity
- Which characteristic(s) account(s) for the success ofarthropods?a. jointed exoskeletonb. well-developed nervous systemc. segmentationd. respiration adapted to environmente. All of these are correct.Some species of animals gain physiological advantages byexploiting the specialized physiological capabilities of otherspecies. Explain how marine mammals that prey on teleost fishrather than invertebrates illustrate this principle. Also explainhow carnivorous mammals that prey on herbivorous mammalsin deserts illustrate the same principle.For animals adapted to it, swimming is energetically the cheapest typeof locomotion because ofa. streamlined body forms in aquatic organisms.b. slow speed of movement of some swimmers.c. buoyancy of water.d. a and c only.e. a, b, and c.
- Which word-part is not defined correctly? A. echino = radial B. pod = foot C. arthro = jointed D. phore = having/bearing E. cephalo = head 12Which characteristic(s) account(s) for the success of arthropods?a. jointed appendagesb. an exoskeletonc. segmentationd. All of these are correctMany species of animals make alarm calls, whichwarn others in their group that a predator isapproaching. Alarm calls also attract the attention of the predator, making it more likely thatthe individual making the call will be eaten. Whymight natural selection favor the evolution ofalarm calls in a species? How might you test thathypothesis?
- This question is not assk seperate, you not finfished it.Gills are found ina. fish.b. marine arthropods.c. mollusks.d. All of the above1. How would you suspect the shells of forams look now compared to a few hundred years ago? (Hint: think about our average temperature) 2. In addition, climate change has caused our oceans to become more acidic. What do you think this has done to the shells of these organisms that are made mostly of calcium, the same building block as our bones?