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Your Questions About Four Interlocking Circles

May 7, 2013

Robert asks…

biology 101 questions, please help~!?

Hello everyone. These are multiple questions from biology 101 class. I’ve been reading and reading my book and can’t find the answers. Please take your time and check my answers please. You DON’T have to answer them all, but answer ones you know for SURE. Thank you all very much in advance.

Speciation caused by the separation of the continents is
a.divergence.
b.parapatry.
c.gene flow.
d.allopatry.
e.sympatry.

Parapatric speciation occurs most often
a.within in the same home range.
b.near a common border between two home ranges.
c.within a group of interbreeding populations.
d.on either side of geographic barriers.
e.by polyploidy.

Anagenesis is the pattern of speciation that results from
a.a divergence of one species into several.
b.a common ancestor.
c.speciation along a single, unbranched line of descent.
d.the merger of several species into one.
e.hybridization.

The traditional evolutionary diagrams are in the form of
a.interlocking circles.
b.a wheel and spokes.
c.a set of parallel lines.
d.a tree.
e.segmented bars.

The gradual model of evolutionary change holds that most morphological change occurs
a.gradually but without development of new species.
b.gradually at first, but rapidly after a new species is formed.
c.gradually during the process of speciation.
d.rapidly at first, but gradually after a new species is formed.
e.gradually for large organisms and rapidly for small ones.

Matching

Respond to the statements with reference to the four microevolutionary processes listed.
a.mutation
b.gene flow
c.genetic drift
d.natural selection

____1.erodes species cohesion

___A_2.original source of alleles

____3.preserves species cohesion

____4.preserves or erodes species cohesion depending on environmental pressures

____5.results from differential survival and reproduction

Administrator answers:

1.e
2.c
3.a
4d

matching

1.c
2a
3b
4d
5d

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