Bio 1b, Lab 2

1. Identify the Organism.

Bacteria-Lack membrane bound organelles-No true chromosomes

Plants-Membrane bound organelles-True chromosomes.

Protozoa-Lack membrane bound organelles-True chromosomes.

Fungi-Membrane bound organelles-True chromosomes.

The correct answer is Bacteria because they lack membrane-bound organelles and do not have true chromosomes. Fungi, Protozoa, and Plants do not match the description provided in the question.

Explanation

The correct answer is Bacteria because they lack membrane-bound organelles and do not have true chromosomes. Fungi, Protozoa, and Plants do not match the description provided in the question.

2. Identify the Organism.

Bacillus sp.-Rod-shaped bacilli

Escherichia coli - Spiral-shaped bacteria.

Aspergillus niger - Fungal spores.

Streptococcus sp. - Circular-shaped cocci.

The correct answer is Bacillus sp., which are rod-shaped bacilli. Streptococcus sp. are circular-shaped cocci, Escherichia coli are rod-shaped bacteria, and Aspergillus niger are fungal spores, which are not the correct answers for this question.

Explanation

The correct answer is Bacillus sp., which are rod-shaped bacilli. Streptococcus sp. are circular-shaped cocci, Escherichia coli are rod-shaped bacteria, and Aspergillus niger are fungal spores, which are not the correct answers for this question.

3. Identify the Organism.

Saccharomyces cerevisiae- a species of yeast used in baking and brewing.

Arabidopsis thaliana- a model organism used in plant biology research.

Escherichia coli- a type of bacteria commonly found in the intestines.

Physarum polycephalum-species of plasmodial slime mold (Myxogastrida)-Plasmodium: multinucleate structure not divided by cell membranes.-Sclerotium: Hard resistant covering formed during unfavorable conditions

4. Identify the Organism.

Euglena - a single-celled protist, possessing both plant and animal characteristics.

Mixed Cyanobacteria (Blue-green Algae)-prokaryotes, NOT algae, photosynthetic capabilities

Paramecium - a unicellular, ciliated protist belonging to the phylum Ciliophora.

Plasmodium falciparum - a protozoan parasite causing malaria in humans.

The correct identification of the organism is mixed cyanobacteria, commonly referred to as blue-green algae. It is important to note that blue-green algae are prokaryotes, not true algae, and exhibit photosynthetic capabilities.

Explanation

The correct identification of the organism is mixed cyanobacteria, commonly referred to as blue-green algae. It is important to note that blue-green algae are prokaryotes, not true algae, and exhibit photosynthetic capabilities.

5. Identify the organism which is a member of Chlorophyta (green algae), has spiral chloroplasts, pyrenoids, and a distinct cell wall.

Diatom

Plasmodium

Euglena

Spirogyra-Member of Chlorophyta (green algae)-Have Spiral Chloroplast-Pyrenoids: structures along the chloroplast that store starch-Have a distinct cell wall

Spirogyra is a type of green algae with spiral chloroplasts, pyrenoids for storing starch, and a distinct cell wall. Euglena is a type of protist with a flagellum for movement, diatom is a type of algae with a silica cell wall, and Plasmodium is a parasitic protist causing malaria.

Explanation

Spirogyra is a type of green algae with spiral chloroplasts, pyrenoids for storing starch, and a distinct cell wall. Euglena is a type of protist with a flagellum for movement, diatom is a type of algae with a silica cell wall, and Plasmodium is a parasitic protist causing malaria.

6. Identify the Organism.

Spirogyra-genus of filamentous green algae with spiral chloroplasts

Oedogonium-genus of freshwater alga, found in pond cultures-Netlike chloroplasts that extend around inner wall of cells-Pyrenoids: structures along the chloroplast that store starch-Oogoia: Structure along filaments where female gametes are formed

Fucus-genus of brown algae commonly known as rockweed or bladderwrack

Volvox-genus of freshwater green algae that forms spherical colonies

The correct answer Oedogonium is a genus of freshwater alga with specific characteristics, whereas the incorrect answers are different genera of algae with distinct features.

Explanation

The correct answer Oedogonium is a genus of freshwater alga with specific characteristics, whereas the incorrect answers are different genera of algae with distinct features.

7. Identify the Organism.

Volvox-Swimming spherical colony of several thousand cells-loose coordination between cells, but each is photosynthetic and self-sustaining.-form daughter colonies from cells specialized for reproduction

Paramecium-Slipper-shaped protozoan with cilia for movement and food intake in water environments.

Amoeba-Single celled organism that moves and feeds by pseudopods.

Euglena-Unicellular organism with a flagellum for movement and chloroplasts for photosynthesis.

Volvox is a unique organism with characteristics of being a colony of cells that work together. Unlike the incorrect answers provided, Volvox is a multicellular organism with specialized cells for reproduction and photosynthesis.

Explanation

Volvox is a unique organism with characteristics of being a colony of cells that work together. Unlike the incorrect answers provided, Volvox is a multicellular organism with specialized cells for reproduction and photosynthesis.

8. Which organism is described as one of the simplest chlorophytes, unicellular, and bi-flagellated?

Euglena

Paramecium

Stentor

Chlamydomonas-one of the simplest chlorophytes-unicellular and bi-flagellated.

Chlamydomonas is a unicellular green alga that belongs to the division Chlorophyta. It is characterized by its bi-flagellated structure and simple body organization. Stentor, Paramecium, and Euglena are also unicellular organisms, but they belong to different groups and have different characteristics compared to Chlamydomonas.

Explanation

Chlamydomonas is a unicellular green alga that belongs to the division Chlorophyta. It is characterized by its bi-flagellated structure and simple body organization. Stentor, Paramecium, and Euglena are also unicellular organisms, but they belong to different groups and have different characteristics compared to Chlamydomonas.

9. Identify the Organism.

Ficus carica - Common fig tree with edible fruit

Canis lupus - Gray wolf found in the wild

Felis catus - Domestic cat breed

Nemalion sp.-Member of Rhodophyta (red algae), mostly restricted to ocean-commonly referred to as seaweed-Blades: leaf-like structures-Stipes: stem-like structures-Holdfasts: root-like structures

The correct answer describes the characteristics of Nemalion sp., a type of red algae commonly known as seaweed found in oceans. The incorrect answers refer to a fig tree, a gray wolf, and a domestic cat breed, which are not related to the description provided.

Explanation

The correct answer describes the characteristics of Nemalion sp., a type of red algae commonly known as seaweed found in oceans. The incorrect answers refer to a fig tree, a gray wolf, and a domestic cat breed, which are not related to the description provided.

10. Identify the Organism.

Porphyra sp.-Member of Rhodophyta (red algae), used in making nori sheets.

Laminaria sp.-Member of Phaeophyta (brown algae), restricted to ocean-commonly referred to as seaweed.

Fucus sp.-Member of Phaeophyta (brown algae), found in intertidal zones.

Ulva lactuca-Member of Chlorophyta (green algae), commonly known as sea lettuce.

The correct answer is Laminaria sp., which is a type of brown algae commonly found in oceans. The other options provided are also types of algae, but they do not match the specific characteristics mentioned in the question.

Explanation

The correct answer is Laminaria sp., which is a type of brown algae commonly found in oceans. The other options provided are also types of algae, but they do not match the specific characteristics mentioned in the question.

11. Identify the Organism: Diatoms

Protozoa

Diatoms Pennate and Centrate-unicellular algae with a wall of silica-microscopic photosynthesizers, primary food source for most marine food chains-contain abundant carotenoids and fucoxanthin (pigments)-Found in ocean, freshwater, and soil-Frustule: silicon impregnated case-Raphe: a longitudinal line found on the frustule-Pennate: bilaterally symmetrical-Centrate: radially symmetrical-have many uses including grinding, polishing, filtering, and providing information for geologists

Cyanobacteria

Lichen

Diatoms are unicellular algae with a wall of silica, often referred to as microscopically photosynthesizers, and are a primary food source for most marine food chains. They are found in oceans, freshwater, and soil.

Explanation

Diatoms are unicellular algae with a wall of silica, often referred to as microscopically photosynthesizers, and are a primary food source for most marine food chains. They are found in oceans, freshwater, and soil.