Which of the following ideas proposed by Lamarck was later found to be incorrect?
a) Acquired charaacteristics can be inherited
b) Analogous structures can be inherited
c) Living things change over time
d) The Eatrth is very young <- this one, right?
Which of the following is needed for new species to form?
a niche
homologous structures
analogous structures
reproductive isolation <- this one?
thanks!
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Evolution … 2 Mc Questions? (please Explain)?
Posted on June 14, 2011.
Which of the following ideas proposed by Lamarck was later found to be incorrect?
a) Acquired charaacteristics can be inherited
b) Analogous structures can be inherited
c) Living things change over time
d) The Eatrth is very young <- this one, right? Well, D isn't true. But D was not proposed by Lamarck. The correct answer would be A. First, think about this. How are characteristics inherited anyways? That's right, DNA. An characteristic that an animal acquires over its lifetime will NOT change its DNA! So how can that characteristic possibly be passed on to its offspring? Which of the following is needed for new species to form? a) a niche b) homologous structures c) analogous structures d) reproductive isolation <- this one? D is correct. A species is defined as a group of organisms who can reproduce with each other. If the organisms cannot reproduce together, then a new species has formed.
Which of the following ideas proposed by Lamarck was later found to be incorrect?
a) Acquired characteristics can be inherited
A blacksmiths children do not have larger muscles because of their father’s work. The timespan required was not determined because experiments to determine how quickly is happened, showed that it doesn’t happen.
Which of the following is needed for new species to form?
reproductive isolation
Once gene pools are isolated, it is a matter of time (potentially, thousands of generations) until the populations become too dissimilar to ever interbreed.
You’re wrong on the first question. Read the first two paragraphs of the first reference below for a brief and interesting introduction to Lamarck.
You’re right on the second question. If two groups of organisms are not reproductively isolated, then they must be interbreeding and producing fertile offspring, which means they are the same species.