FREE BIOLOGY AND STUDY GAMES ABOUT EXAM 1

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FREE BIOLOGY AND STUDY GAMES ABOUT EXAM 1

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -95 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Sister taxa

Answer:

taxa derived from an ancestral node Ex. Crocs and birds Every other descendant from that common ancestor

Question 2: Adaptive radiation can result in...

Answer:

character displacement

Question 3: disruptive selection favors...

Answer:

phenotypes at both ends of the range

Question 4: Paraphyletic Group

Answer:

inclues the most recent common ancestor but not all of its descendents

Question 5: Postzygotic Isolation Mechanisms

Answer:

prevent normal development of organisms to reproduce adults

Question 6: requirements of natural selection

Answer:

phenotypic varience variation is heritable phenotype influences survival and reproduction(fitness)

Question 7: Morphological species concept

Answer:

if they look different then we make them different.can be deceptive sometimes bc different species can look a lot alike or different organisms of the same species look different

Question 8: adaptive radiation

Answer:

they radiate out as they adapt to new niches.rapid evolution from a common ancestor Ex. drosophilia on the Hawaiian islands

Question 9: Systematics

Answer:

science of forming hypothesized evolutionary relationships of organisms

Question 10: A monophyletic group

Answer:

includes the most recent common ancestor of the group and all its descendants

Question 11: Ellis-Van Crevald

Answer:

Amish Disease

Question 12: Homoplasy

Answer:

convergence or reversal reversals can remove synapomorphies

Question 13: oscillating selection

Answer:

The Grants studied finches and their beak sizes oscillated in size depending upon the environment.Weather influeces what plants survive resulting in different types of seeds the birds have to eat. Need a bigger beak for bigger seeds

Question 14: Sympatric speciation

Answer:

speciation among individuals in the same geographic locality

Question 15: agents of evolutionary change

Answer:

mutation gene flow non-random mating must not occur random genetic drift natural selection

Question 16: Analogous traits

Answer:

same function, different structure.Ex. can all fly but they didn't inherit it from common ancestors

Question 17: for a trait to evolve by natural selection there must be...

Answer:

variation among individuals a mechanism of inheritance fitness differences among individuals based on that trait

Question 18: Prezygotic isolation

Answer:

Geographic isolation Ecological isolation Behavioral isolation Temporal isolation Mechanical isolation

Question 19: Irreducible complexity

Answer:

the theory that an organism must have all of its parts to be able to function. eubacteria flagellum is not irreducibly complex bc it's missing proteins and it still functions

Question 20: derived traits

Answer:

traits that define a taxonomic group traits that have evolved since its most recent common ancestor Ex. Crocs- 2 degree palate in mouth

Question 21: genetic drift

Answer:

occurs in all pops. has the greatest effect in small pops can reduce genetic variation in a pop can lead to loss of alleles in isolated pops

Question 22: taxa

Answer:

all of the species

Question 23: Data needed to form a cladogram

Answer:

• Select an outgroup

• Build a set of characters(traits)

• Assign character states to each taxon.

• Analyze characters for homology