Fill In the Blank: Use the below terms to complete the following paragraph. Four major features distinguish the embryos of chordates from those of all other animals: a hollow dorsal (#4) _______ _________, a(n) (#5) __________ with slits in its wall, a(n) (#6) _________, and a tail that extends past the anus at least during ...continues
Birds descended form (#33) ____ that ran around on two legs some 160 million years ago. All birds have (#34) ______ that insulate and help get the bird aloft. Generally, birds have a greatly enlarged (#35) ____ to which flight muscles are attached. Bird bones contain (#36) ____ _____, and air flows through sacs, not into and o ...continues
The platypus and the spiny anteater are examples of which mammalian group? a. marsupials b. monotremes c. placentals d. hominids Almost all invertebrate chordates are a. predators b. parasites c. filter feeders d. scavengers Which of the following is not a characte ...continues
Mammals alone a. have hair and mammary glands b. have a four-chambered heart c. have the ability to regulate body temperature d. exhibit parental care of the young Genetic and immunological evidence show that the greatest differences occur between human populations native to ______ and all other human populations. a. ...continues
1. How long can Hagfish go without eating? A. 1 month B. 3 months C. 5 months D. 7 months 2. How is Hagfish sex influenced by the seasons? A. They have sex in the spring only B. They change sexes with the seasons C. Seasons have no effect D. None of the above 3. Do Hagfish skeletons contain bone? A. Yes ...continues
How many vertebrae does a frog have? A. 9 B. 12 C. 15 D. 21 How many chambers does a frog's heart have? A. 3 B. 4 C. 5 D. 6 How long does the larval stage of an amphibian last? A. several weeks to 1 year B. 24 hours C. exactly 21 days D. 9 months How many toes are on the front feet of a frog? A. 2 B. 3 C ...continues
Cartilaginous fishes include about 850 species of rays, skates, (#29) _____, and chimaeras. They have conspicuous fins and five to seven (#30) _______ _______ on both sides of the pharynx. Of the existing species of fishes 96 percent are (#31) ________. Their ancestors arose during the Silurian period perhaps as early as 45 ...continues
Dichotomous key/taxonomic category
In the animal kingdom, you can place animals in categories based on certain differences in the characteristics that each possesses. If you know what critical traits to look for, it is possible to separate any animal into its proper taxonomic category. Use this dichotomous key to help determine the taxonomic category to which a s ...continues
Difference in herbivore and carnivore guts are examined.
How do the different constituents in the diets of herbivores and carnivores account for the main differences in structure between the gut of a herbivore and that of a carnivore?
Why do animals need respiratory organs?
Why do animals need respiratory organs? What features do most respiratory systems share? Describe the features of the human repiratory system.
