37. Wings, fins, and arms are limb adaptations that allow mammals to
a. live in different environments
b. attain diverse sizes
c. nurse their young
d. communicate with other mammals
A?
4. Which is NOT a characteristic of function of the epidermis?
a. repair of damaged cells
b. flattened cells
c. protection from outside forces
d. contain waterproofing protein
A?
22. Which of the following is a way that birds are different from most reptiles?
a. They are endothermic
b. They have feathers
c. They have four-chambered hearts
d. all of the above
D?
23. A four-chambered heart is efficient at carrying oxygen for the high metabolism of
a. ectotherms
b. reptiles
c. amphibians
d. endotherms
D?
-MC
all correct/
Thanks!
-MC
For 37, the correct answer is a. live in different environments.
For 4, the correct answer is a. repair of damaged cells.
For 22, the correct answer is b. They have feathers.
For 23, the correct answer is d. endotherms.
To answer these questions:
37. The question is asking about limb adaptations in mammals. To determine the correct answer, we need to understand what these limb adaptations (wings, fins, and arms) allow mammals to do.
Option A: "Live in different environments" - Limb adaptations could provide mammals with the ability to navigate and survive in various environments, such as flying in the air or swimming in water. This option is a possible correct answer.
Option B: "Attain diverse sizes" - Limb adaptations may contribute to the ability of mammals to have different body sizes. However, this option does not directly address the function of the mentioned limb adaptations.
Option C: "Nurse their young" - Although nursing their young is a characteristic of mammals, it is not specifically related to limb adaptations.
Option D: "Communicate with other mammals" - Limb adaptations in mammals are not directly related to communication with each other.
Based on the above analysis, the correct answer would be option A: live in different environments.
4. The question is asking for the option that is NOT a characteristic or function of the epidermis.
Option A: "Repair of damaged cells" - The epidermis, which is the outermost layer of the skin, is primarily responsible for protection and preventing the entry of pathogens. It does not actively repair damaged cells, so this option is not a characteristic of the epidermis.
Option B: "Flattened cells" - The epidermis is composed of multiple layers of cells, and the cells in the outermost layer are indeed flattened to provide a protective barrier.
Option C: "Protection from outside forces" - This is one of the main functions of the epidermis, as it acts as a physical barrier against environmental factors such as pathogens, UV radiation, and dehydration.
Option D: "Contain waterproofing protein" - The epidermis does contain proteins that contribute to its water-resistant properties. For example, keratin is a protein found in the epidermis that helps minimize water loss.
Based on the above analysis, the correct answer would be option A: repair of damaged cells.
22. The question is asking for a way in which birds are different from most reptiles.
Option A: "They are endothermic" - This refers to the ability of birds to regulate their body temperature internally. Most reptiles are ectothermic, meaning their body temperature is influenced by external factors. Birds being endothermic is indeed a characteristic that sets them apart from most reptiles.
Option B: "They have feathers" - Feathers are a unique adaptation of birds and are not present in most reptiles.
Option C: "They have four-chambered hearts" - The presence of a four-chambered heart is not specific to birds. Some reptiles, such as crocodilians, also have four-chambered hearts.
Option D: "All of the above" - This option would include all the characteristics mentioned (endothermic, feathers, and four-chambered hearts), which makes it correct.
Based on the above analysis, the correct answer would be option D: all of the above.
23. The question is asking which group benefits from having a four-chambered heart due to their high metabolism.
Option A: "Ectotherms" - Ectotherms are cold-blooded animals whose body temperature is primarily regulated by external factors. They do not typically have high metabolic rates.
Option B: "Reptiles" - Reptiles, being ectothermic, do not typically have high metabolic rates that would require the efficiency of a four-chambered heart.
Option C: "Amphibians" - Amphibians, like reptiles, are ectothermic and do not generally have high metabolic rates.
Option D: "Endotherms" - Endothermic animals, such as mammals and birds, have a high metabolic rate that requires efficient oxygen transport, which a four-chambered heart provides. This makes option D the correct answer.
Based on the above analysis, the correct answer would be option D: endotherms.