Question 1

Which phylum does Volvox belong to, and what is its primary nutritional mode?

Accepted Answer

Phylum Chlorophyta; phototroph

Question 2

Spirogyra is known for its spiral chloroplasts. What process does Spirogyra use for sexual reproduction, and what is the main outcome of this process?

Accepted Answer

Conjugation; formation of zygospores

Question 3

Diatoms are members of the phylum Bacillariophyta. What is a unique characteristic of diatoms that contributes to the formation of diatomaceous earth?

Accepted Answer

Silica test (shell)

Question 4

Polysiphonia, a red algae, gets its color from which pigment group?

Accepted Answer

Phycobilins

Question 5

Euglena is classified as a mixotroph. Which structure allows Euglena to move, and what is its nutritional mode?

Accepted Answer

Flagella; mixotroph

Question 6

Plasmodial slime molds (Phylum Myxomycota) are fungus-like protists. What is a unique cellular feature of their active growth stage?

Accepted Answer

Multinucleate cytoplasm

Question 7

Saprolegnia, a water mold, belongs to Phylum Oomycota. What is a distinguishing feature of its cell wall compared to true fungi?

Accepted Answer

Cell wall composed of cellulose

Question 8

Amoeba, a member of Phylum Sarcodina/Rhizopoda, moves using which structure, and what is its nutritional mode?

Accepted Answer

Pseudopodia; heterotroph

Question 9

Foraminifera are important contributors to limestone formation. What is their shell made of, and how do they move?

Accepted Answer

Calcium carbonate shell; threadlike pseudopodia

Question 10

Radiolarians are distinguished from other protists by their shell composition. What is their shell made of, and what type of pseudopodia do they possess?

Accepted Answer

Silicon dioxide shell; thin stiff pseudopodia

Question 11

Entamoeba histolytica is a pathogenic protist. What disease does it cause, and how is it commonly transmitted?

Accepted Answer

Amoebic dysentery; fecal-oral route

Question 12

Trypanosoma rhodesiense is a flagellate that causes African sleeping sickness. What is a unique structural feature of this organism?

Accepted Answer

Undulating membrane

Question 13

Dinoflagellates are known for causing red tides. What is a potential consequence of red tides for humans?

Accepted Answer

Shellfish poisoning

Question 14

Giardia lamblia is often confused with Entamoeba histolytica on slides. What disease does Giardia cause, and what is its primary mode of transmission?

Accepted Answer

Giardiasis; contaminated water

Question 15

Trichonympha is a symbiont found in termites. What is its primary function in the termite gut?

Accepted Answer

Digestion of cellulose

Question 16

Paramecium is a ciliate protist. Which structure is responsible for drawing food into the organism, and what is its main mode of locomotion?

Accepted Answer

Oral groove; cilia

Question 17

Which of the following best describes the reaction of Paramecium to a negative stimulus such as vinegar?

Accepted Answer

Reverses direction and moves away from the stimulus

Question 18

Plasmodium vivax and Plasmodium falciparum are responsible for malaria. Which stage of the Plasmodium life cycle occurs in the human liver, and what is released during this stage?

Accepted Answer

Schizont stage; merozoites

Question 19

In the Plasmodium life cycle, sexual reproduction occurs in the mosquito. Which process leads to the formation of sporozoites that are transmitted to humans?

Accepted Answer

Oocyst releases sporozoites after zygote formation

Question 20

A patient presents with symptoms of malaria. If the number of merozoites released per schizont is $n$, and each merozoite infects a red blood cell, what is the total number of infected cells after $k$ cycles, assuming each cycle multiplies the infected cells by $n$? Express your answer in terms of $n$ and $k$.

Accepted Answer

$n^k$

Chapter 17 Bio Lab Review

Study Guide - Practice Questions

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