Cetaceans give birth to few well-developed calves at well-spaced intervals. They also feed and protect the calves for long periods. This is insharp contrast to most fishes, in which many eggs are spawned and theparents spend no time feeding and protecting the offspring. What do youthink is the best strategy? Has this strategy paid off in the great whales?

Q: Bring out the differences between the heart of shark and that of frog?

A: The heart of a shark has two chambers: an atrium or auricle and a ventricle. Deoxygenated blood from…

Q: what is the reproductive strategy for fish?

A: Fishes are mostly oviparous. Polygamy, polyandry and monogamy are a part of the reproductive…

Q: The cirripedia are used for the purpose of grindng food particles prior to their entry to the…

A: It is an arthropod belonging to the infraclass Cirripedia of the subphylum Crustacea. It is related…

Q: Land snail and slugs use which of the following for gas-exchange? (mark all that apply) the radula…

A: Snails use radula to drill holes in prey or to capture the food from surface. Spiracle is found in…

Q: give the function of these shark parts. 1. pectoral fin 2. pelvic fin 3. anal fin 4.…

A: Sharks are excellent swimmers, with streamlined bodies and specialized fins that allow them to move…

Q: Explain why amphibians are sometimes called “canaries in acoal mine.”

A: Sentinel species are the animals that used to find out the risks to human beings by providing and…

Q: Describe the functions of the parts of the crayfish. What are the ecology and economic biology of…

A: Crayfish are freshwater crustaceans resembling small lobsters.They are members of the superfamilies…

Q: Which type of feeding strategy would result in a marine mammal using taste and/or smell to feed?

A: Mammals are a group of diverse animals that may live in different habitats including water.  Some…

Q: Branchial arches of the shark support the gill  pouches and each one consists of five cartilagous…

A: Sharks are a gathering of elasmobranch fish known by a cartilaginous skeleton, five to seven gill…

Q: Describe feeding behavior in hagfishes and lampreys. How do they differ?

A: There are around 119 species that are present in the living jawless species, which are classified…

Q: A terrestrial animal species is discovered with the following larval characteristics: exoskeleton,…

A: The phylum is the division of Kindom in the process of classification of organisms in which the…

Q: Which is the type ofnitrogen waste birds produce?Why does this feature, besidesbeing an adaptation…

A: Excretory system helps in collecting nitrogenous waste and expelling it into the external…

Q: Although a virus is very virulent now, it will eventually evolve to become much less virulent.…

A: A virus is a submicroscopic organism that contains genetic information either in the form of DNA…

Q: When fish that are capable of changing their sex are first females and develop into males later in…

A: Schooling is a group of fish that stay together and swim in the same direction.   Transition is the…

Q: Is there any genetic evidence linking lobe-finned fish and amphibians

A: Lobe-finned fishes and amphibians are closely related and connected through a common ancestor which…

Q: What feature separates the Chondrichthyans (sharks and rays) from the lobed-finned fishes? O some…

A: The class Chondrichthyes has two subclasses: the subclass Elasmobranchii (sharks, beams, skates, and…

Q: Snail and Squid Compare the external features of each to each other and the clam. What are the…

A: Molluscs have the most diverse types of any animal phylum. Snails, slugs, and other gastropods;…

Q: What would happen if the squid’s environment gradually changed—would all squid die?

A: No, squid will not die if environment  gradually change

Q: Other than feeding and reproduction, could you suggest other possible reasons why marine fishes…

A: Marine fish migration is a complex behavior that involves movement from one habitat to another.…

Q: Describe two different adaptations (behavioral, morphological, physiological) of butterfly fish that…

A: Butterfly fish is a marine animal belongs to phylum chordata,Class Actinopterygii and family…

Q: Which of the following are jawless? Choose all that apply. O hagfish O lampreys O bony fishes O…

A: Jawless organisms are belongs usually to class Agnatha and primitive in nature.

Q: Does other factors (besides temperature) affect the rate of a fish?

A: Fishes are aquatic organisms that belong to the Chordata phylum the vertebrates. Fishes are…

Q: Please write a brief summary describing the producing in the great hammerhead shark.

A: The process of creating people of the same sort is known as reproduction. Most creatures reproduce…

Q: Snapping shrimp have evolved very rapid movements in the structures they use to capture prey. These…

A:

Q: Describe the functions of the structures of the sharks. What is the feeding strategy of the shark,…

A: There are almost 500 species of sharks in the ocean. Mostly all songs are having a similar kind of…

Q: Describe the major vertebrate adaptations that arose in fishes. Which of these features are also…

A: Fishes are the aquatic chordate animals which belong to Pisces family. Fishes are used as delicacy…