Biology 1202B Study Guide - Psychrophile, Panspermia, Cell Membrane
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QUESTION 19
Among all protostomes, which morphological trait is most varied?
type of symmetry | ||
type of body cavity | ||
number of embryonic tissues | ||
type of development |
1 points
QUESTION 20
Nematodes are acoelomate animals.
True
False
1 points
QUESTION 21
The first genetic material on Earth was probably __________.
DNA produced by reverse transcription | ||
DNA molecules whose information was transcribed to RNA | ||
protobionts | ||
self-replicating RNA molecules |
1 points
QUESTION 22
Free point. Mark "true"
True
False
1 points
QUESTION 23
Which of the following is a characteristic of a flagellate?
The use of pseudopods as feeding structures. | ||
They are often multinucleate. | ||
They can exchange genetic material with other ciliates by the process of mitosis. | ||
Most live as solitary autotrophs in fresh water. |
1 points
QUESTION 24
The chelicerates have 2 pair of antennae.
True
False
1 points
QUESTION 25
Nematoes and arthropods both _________________.
develop an anis from the blastopore formed during gastrulation | ||
are suspension feeders | ||
grow by shedding their exoskeleton | ||
have ciliated larva |
1 points
QUESTION 26
If a lung were to be found in a mollusc, where would it be located?
incurrent siphon | ||
mantle cavity | ||
visceral mass | ||
excurrent siphon |
1 points
QUESTION 27
True segmentation (metamerism) evolved 3 seperate times.
True
False
1 points
QUESTION 28
The first coelomate animals are the _______________________________.
Nematoda | ||
Platyhelminthes | ||
Mollusca | ||
Arthropoda |
1 points
QUESTION 29
Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which of these questions is currently the most problematic and would have the greatest impact on our understanding if we were able to answer it?
How can amino acids, simple sugars, and nucleotides be synthesized abiotically? | ||
How did RNA sequences come to carry the code for amino acid sequences? | ||
How could polymers involving lipids and/or proteins form membranes in aqueous environments? | ||
How can RNA molecules act as templates for the synthesis of complementary RNA molecules? |
1 points
QUESTION 30
The greatest number of endemic species is expected in environments that are _____.
easily reached and ecologically diverse | ||
isolated and show little ecological diversity | ||
isolated and ecologically diverse | ||
easily reached and show little ecological diversity |
1 points
QUESTION 31
A population of organisms will not evolve if _____.
all individual variation is due only to environmental factors | ||
the environment is changing at a relatively slow rate | ||
the population size is large | ||
the population lives in a habitat without competing species present |