Gen Bio 2 Ch 25 Review

Suppose it were possible to conduct sophisticated microscopic and chemical analyses of micro-fossils found in 3.5 byo stromatolites. Which of the following structures would be surprising to observe?

• RNA

• Nucleus

• Vesicles

• Ribozymes

What is thought to be the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth?

1. Origin of mitochondria
2. Origin of multiceullular eukaryotes
3. Origin of chloroplasts
4. Origin of cyanobacteria
5. Origin of fungal-plant symbioses

• 4, 3, 2,1, 5

• 4, 1, 2, 3, 5

• 4, 1, 3, 2, 5

• 4, 3, 1, 5, 2

• 4, 3, 1, 2, 5

All protists are...

• Unicellular

• Eukaryotic

• Symbionts

• Monophyletic

Temporary projections of eukaryotic cell membranes of unicellular protists that aid in feeding and movement are called...

• Pseudocells

• Pseudopodia

• Protocells

• Protobionts

Which group is incorrectly paired with its description

• Rhizarians- Threadlike pseudopodia

• Diatoms- Silica in cell wall

• Red algae- Acquired plastids by secondary endosymbiosis

• Ciliates- red tide organisms

• Diplomonads- Modified mitochondria

A snail-like, coiled, porous test (shell) of calcium carbonate is characteristic of which group?

• Diatoms

• Foraminiferans

• Red Algae

• Cercozoans

________________ are members containing concentrated organic molecules and have some life-like properties (i.e., share characteristics with cells), but are not alive.

• Protobionts

• Cell Wall

• Cellulose

• Hardy-Weignberg Equation

Trypanosoma is an organism that causes African sleeping sickness and is transmitted to a human by a __________________

• Tsetse Fly

• Fly

• Vampire

• Sickle-Cell

What type of life cycle is observed in plants and some algae?

• Alteration of Generations

• Asexual Reproduction

• Sexual Reproduction

• Binary Fission

A biologists discovers an alga that is marine, multicellular, lives at a depth with very little light, and is highly branched. This alga probably belongs to which group?

• Brown Algae

• Red Algae

• Green Algae

• Yellow ALgae