For each of the following organelles or structures, check the corresponding box if the organelle or structure is named or discussed in the animation.
A) lysosomes
B) the nucleus
C) mitochondria
D) the Golgi apparatus
E) ribosomes
Ans:
B) the nucleus
C) mitochondria
E) ribosomes
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Researcher discovers a new unicellular organism that contains a single circular chromosome and no membrane-bound organelles. Upon closer observation, the researcher notices that this organism can also fix nitrogen and produce methane
How should this organism be classified? A. as a bacterium B. as an archaeon C. as a eukaryote
Ants, termites, and some other insects as well as
mole-rats are __________. Fill in the blank(s) with the appropriate word(s).
Which of the following pairs is mismatched?
A) dissimilatory sulfate-reducing bacteria — produce H2S B) archaea — extremophiles C) chemoautotrophic bacteria — fix atmospheric nitrogen D) actinomycetes — reproduce by fragmentation E) Cytophaga — a gliding, nonfruiting bacterium
Answer the following questions true (T) or false (F)
1. Most species of sponges live in freshwater environments, but a few species are marine. 2. Cnidarians such as jellyfish have muscle and nervous tissues. 3. Annelids demonstrate the important animal characteristic of body segmentation.