Question

1a. Choose the false statement:

A) The vast majority of animals exhibit a larval form as a part of their life cycle; among those animals that lack a larval form, most are terrestrial.

B) Segmentation in the body of animals is only seen in Annelids and Arthropods; accordingly, since this feature is absent in Chordates, it is a characteristic unique to invertebrates.

C) The amniotic sac, which behaves like a small pond contained within the eggs of reptiles, birds, and mammals, enables these three classes of vertebrates to develop on land.

1b) All of the following characteristics apply to Arthropods, except:

a) They are found on land, in the air, in freshwater and in marine habitats.

b) They have jointed appendages.

c) They exhibit more cephalization than any of the Molluscs and more repetitive segmentation than any of the Annelids.

d) Larval forms are common among Arthropods; this feature contributes to their ability to produce huge numbers of offspring.

e) Specialization of body parts is a hallmark of this phylum.

1c) Choose the false statement:

a) Vertebrates make up the majority of Chordates; they exhibit the largest range of body size, the most complexity, and the highest metabolic requirements of all the animals.

b) In spite of their complexity, vertebrates have the same number of Hox genes as all other animals.

c) Given the nature of Hox genes as “genes coding for process, not product”, it would make sense that the Hox gene for limb development in a mouse is the same as that required to trigger limb development in a fruit fly.

Answer 1