Use the Following Information to Answer the Question

question 68

Multiple Choice

Use the following information to answer the question.
Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways:
(1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae.
Which process in Paramecium results in genetic recombination but no increase in population size?

• A) budding
• B) meiotic division
• C) conjugation
• D) binary fission

---

Definitions:

External Causes

Factors outside an individual that influence behaviors, events, or outcomes, contrasting with internal factors that derive from within the person.

Conformity

The act of matching attitudes, beliefs, and behaviors to group norms or societal expectations.

Expected Behavior

Actions or reactions that are anticipated in a given context based on societal norms, rules, or personal standards.

Great-person Theory

A theory of leadership that suggests history is shaped by the actions of great individuals who possess unique characteristics and talents.