Bio Lab Exam Protists Diversity Lab 6

Supergroup Chromoalveolata, Group Alveolata, and Subgroup Dinoflagellata are known for their unique characteristics such as being autotrophic or mixotrophic, found in both fresh and marine environments, containing carotenoid pigments that cause water to appear red, producing neurotoxin, having two flagella, and possessing cellulose plates in their thecae.

The correct species looked at in this classification is Peridinium, which belongs to the Dinoflagellata subgroup within the Alveolata group of the Chromoalveolata supergroup.

The correct answer is Plasmodium, which causes malaria and is transmitted through the bite of an infected Anopheles mosquito. The lifecycle of Plasmodium involves stages in both human and mosquito hosts. The incorrect answers provide examples of other species, vectors, and sample types unrelated to the given question.

Conjugation in biology refers to the transfer of genetic material between bacterial cells through direct contact.

Contractile vacuoles in paramecium are responsible for expelling excess water to maintain osmotic balance within the cell. This process prevents the cell from taking in too much water and lysing, or bursting.

Food vacuoles in paramecium develop near lysosomes and on the curve to facilitate the direction of food to its mouth at the base of the oral groove. Incorrect answers include near the nucleus, in the contractile vacuole, and in the mitochondria.

Stramenopila is a diverse group characterized by the presence of 'pila' hair-like projections on their cells, which contribute to their name.

Supergroup Chromalveolata, Group Stramenopila, Subgroup Bacillariophyta, also known as diatoms, are most numerous phytoplankton with cell walls made of two valves of silica. This unique characteristic allows them to form diatomaceous earth, which is commonly used in various industries.

Diatomaceous earth is commonly used in toothpaste and facial scrubs due to its silica content. However, it is not typically used as a fertilizer, pest control method, or food additive.

The Supergroup Chromalveolata, Group Stramenopila, Subgroup Phaeophyta are known for being the most complex protists. A common example, large bull kelp like Nereocystis, possess holdfasts, stipes, and blades which contribute to their complexity.

The correct answer highlights the key similarities and differences between the mentioned groups and fungi in terms of their decomposer nature, filament structure, and cellular components.

Pseudopodia are temporary projections of the cytoplasm used for movement in certain protists such as foraminferans, radiolarions, and amoebozoans. Diatoms, dinoflagellates, and euglenoids move using different mechanisms.

Supergroup Rhizaria, specifically the Group foraminifera, are marine organisms that are shelled protists with thin pseudopodia. Their multi-chambered shells contain calcium carbonate and they form marine deposits, resembling snails.

The correct characteristics of supergroup Rhizaria and group Radiolaria include being marine, shelled protists with delicate pseudopodia that trap bacteria and detritus, and their shells are made of silica which forms marine deposits.

Convergent evolution refers to the phenomenon where distantly related organisms develop similar traits or characteristics independently as an adaptation to similar environments, without sharing a recent common ancestor.