Volvox (Figure) are abundant and active in lakes during the spring and summer. During wint...

Volvox (Figure) are abundant and active in lakes during the spring and summer. During winter they are inactive, existing in a resting state. During most of the spring and summer, Volvox reproduce asexually; but at times they switch and reproduce sexually instead. When would you predict that Volvox would be sexual: spring, early summer, or late summer? Explain your reasoning.

Figure Organisms with two modes of reproduction (a) Volvox, a freshwater alga. Each large sphere is an adult. Most are cloning themselves by growing daughters inside that are genetically identical to the parent. The individuals containing red spheres—encysted zygotes—are reproducing sexually as females. They have been fertilized by sperm from sexual males. (b) Hydra, a freshwater invertebrate. The crown of tentacles at the upper right surround the hydra’s mouth. Along the body below the mouth are three gonads. Below the gonads is an asexual bud. (c) Strawberry. This plant is reproducing sexually via fruits with seeds, and asexually via runners.