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. Theoretically, P. bursaria can obtain zoochlorellae either vertically (via the asexual reproduction of its mother cell) or horizontally (by ingesting free-living Chlorella from its habitat). Consider a P. bursaria cell containing zoochlorellae but whose habitat lacks free-living Chlorella. If this cell subsequently undergoes many generations of asexual reproduction, if all of its daughter cells contain roughly the same number of zoochlorellae as it had originally contained, and if the zoochlorellae are all haploid and identical in appearance, then which statement is accurate?
<em>Zoochlorellae</em> also reproduced asexually at a nearly constant rate
Explanation:
<em>Zoochlorellae</em> (singular <em>Zoochlorella</em>), also referred to as <em>Chlorella</em>-like algae, is a genus of algae that live inside freshwater protozoans (e.g., <em>Paramecium bursaria</em>), exhibiting a symbiotic association with their hosts. Asexual reproduction is a type of reproduction that produces new individuals without the fusion of gametes and does not involve a change in the number of chromosomes. In consequence, a haploid parent, i.e., an individual who contains a single set (n) of chromosomes, will produce haploid (n) offspring. Moreover, and since the question indicates that daughter cells contain approximately the same number of zoochlorellae cells as parent cells, it is expected to observe an asexual reproduction rate at a fairly constant rate over time.
One of the benefits of a vegetarian diet is a reduction in your impact on the environment. Animals store only a small fraction of the energy they extract from the food they eat, and the rest is wasted as heat.
compare and contrast of using solar panels versus wind turbines be sure to include how each works the cost of development in a general community/basic procedures for installments connections at a home etc
Algae is typically an aquatic plant of a large group that includes the seaweeds and many single-celled forms. Algae is also non-flowering and fairly simple. Algae contain chlorophyll but lack true stems, roots, leaves, and vascular tissue.
