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- The special adaptations of birds contribute to two essentials for flight: more power and less weight. Explain how each of the following contributes to one or both of these two essentials: feathers, skeleton, muscle distribution, digestive system, circulatory system, respiratory system, excretory system, reproductive system.Which of the following is true about animals with bilateral symmetry? Select all that apply. they are cephalized they have right sides and left sides they have anterior and posterior ends they have a central nervous system they are generally stationary or sedentaryWhich of the following is a correct way to distinguish reptiles from amphibians? Group of answer choices Reptiles have scales & amphibians don’t. Reptiles sometimes don’t have legs, but amphibians always have them. Amphibians lay eggs and reptiles don’t. Reptiles lay eggs and amphibians don’t. Reptiles go through metamorphosis and amphibians don’t.
- Which of the following is a characteristic of mammals? homodont mammary glands scales ectothermicBirds have all of the following features except: they have external fertilization always have two pairs of limbs they are homoeothermic they have feathersAll of the following are traits of vertebrate species, EXCEPT: The presence of a dorsal nerve cord. The presence of gill slits. The presence of a notochord. The absence of a backbone. The presence of a muscular tail exiting beyond the anus. All of the answers are traits of vertebrate species.
- Hagfish Perch Salamander Lizard Pigeon Mouse Chimp Feathers Fur; mammary glands Claws or nails Lungs Jaws O Morton Publishing Company Which species has the fewest derived characteristics among these groups?Evidence supports that feathers evolved before flight, and were later co-opted for flight. This is an example of Group of answer choices exaptation preadaptation an intermediate state a selective constraintWhich type of primate has a toothcomb? Oprosimian tarsier Onew world monkey (platyrrhine) old world monkey ape
- Data was collected concerning Galapagos bird beak size over time. There are 13 types of Galapagos finches, and they are also known as Darwin's Finches. These finches share the same habits and characteristics except for one; they all have different beaks. The differences in their beaks might be the most important aspect of their survival because beak size determines the type of seed able to be eaten. Only the birds with the largest of beaks are able to eat the toughest, biggest, and spine covered seeds. Based on the data given, choose the BEST conclusion. A) This data shows that over time the type of food available remained constant. Eliminate B) This data shows that the environment did not change over the course of time. C) This data shows a fluctuation in bird species over time most likely due to food availability. D) This data shows a fluctuation in bird species over time most likely due to the inheritance of acquired characteristics. Not GradedWhich choice best describes a reasonable mechanism for animal structures becoming better suited over evolutionary time to specific functions? Animals that eat the most food become the most abundant. Animals that restrict their food intake will become less abundant. Animals with mutations that give rise to effective structures will become more abundant. Animals with parents that continually improve their offspring's structures will become more abundant. Animals with inventions that curtail reproduction will become more abundant.What is wrong with this statement: Birds evolved lighter bones to allowed them to fly and take advantage of open niches. All of the choices are true; none are false. It implies that the variation in the anatomy of birds did not come first, but rather the need did. It implies that there is an intent to evolution. It implies that adaptations evolve out of a need.