Answer the following statements true (T) or false (F)
1. Cephalopods have a ring structure in their skin that secretes mucus to bind mating individuals and forms a protective cocoon for their eggs.
2. Echinoderms have centralized nervous control at the center of their bodies.
3. Monotremes are classified as reptiles because they lay leathery eggs.
4. Male monotremes and eutherians possess mammary glands.
5. Mastication is a kind of physical digestion.
1. False
This statement is false. Earthworms, members of the subclass Oligochaeta, are distinguished by this ring structure called a clitellum.
2. False
This statement is false. Echinoderms do not have centralized nervous control at the center of their bodies.
3. False
This statement is false. Monotremes are mammals because they have mammaries that secrete milk.
4. True
This statement is true. Male monotremes and eutherians possess mammary glands.
5. True
This statement is true. Mastication is a kind of physical digestion.
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Indicate whether the statement is true or false.
The spines of a cactus and the insect traps of
carnivorous plants are modified leaves. Cacti spines and carnivorous plant insect traps are ______ structures.
a. analogous b. homologous c. recessive d. homozygous e. morphogenic
In a population characterized by type III survivorship, the probability of survival ____ with age
a. increases
b. decreases c. does not change d. first decreases then increases e. first increases then decreases
If there is life on another planet within our galaxy, why would we expect to learn that this life would probably use the same narrow range of wavelengths of the electromagnetic spectrum as we do for a source of energy and information?
a. because all life must use the same electromagnetic spectrum by definition b. because of the fundamental aspects of photon energy and light absorption c. because this is the same wavelength that hits the Earth d. because there is no other wavelength available in nature