Question

5 multiple choice 10 points
cephalization is known to be related to the development of what kind of symmetry?
○ radial symmetry
○ bilateral symmetry
○ dorsoventral symmetry
○ trilateral symmetry
6 multiple choice 10 points
in most fungi, which is the dominant ploidy in alternation of generations?
○ diploid 2n (not n+n)
○ haploid
○ tetraploid
○ heptaploid

Explanation:

Question 5

Cephalization (concentration of sensory/neural structures at one end) is associated with bilateral symmetry, where organisms have a distinct front/back, left/right, and top/bottom. Radial symmetry (e.g., cnidarians) has no distinct head, dorsoventral symmetry is a type of bilateral, and trilateral symmetry is rare. So bilateral symmetry is linked to cephalization.

In most fungi, the dominant ploidy in alternation of generations is haploid. Fungal life cycles have a dominant haploid (n) phase; the diploid phase is brief (e.g., zygote). Diploid 2N is not dominant, tetraploid/heptaploid are not typical dominant ploidies in fungi.

Answer:

B. Bilateral Symmetry

Question 6