BIO 182 (BIO182)

What is extinction? correct answer: The loss or death of a species What is mass extinction? correct answer: A decline in biodiversity greater than the background extinction rate What is background extinction? correct answer: Background extinction occurs when certain populations are reduced to zero because of normal environment change, emerging disease, predation pressure, or competition with another species How are mass extinctions detected and how many have been detected? correct an...

How many modes of selection are there? correct answer: 3 What are the modes of selection? correct answer: Stabilizing selection, directional selection, and disruptive selection Stabilizing Selection correct answer: The mean of the trait remains similar over time but the standard deviation decreases Directional Selection correct answer: The mean phenotype shifts in a particular direction Disruptive Selection correct answer: The standard deviation of the trait increases as individ...

Know the key characteristics of the Domain Eukaryota correct answer: -Have cells that are larger than bacteria and archaea -Have a nucleus -Have organelles -Asexual and sexual production Be familiar with the evidence for the endosymbiosis theory and the origin of mitochondria correct answer: Origin of mitochondria: bacteria (that ended up turning into mitochondria) took up residence inside an archaea cell Evidence: Size & structure of bacteria resembles mitochondria, mitochondria have...

What is Autosomal Dominant Inheritance? correct answer: - Dominant Allele - Males and females likely to inherit trait. - "Dominant"- having at least one allele is all it takes What is Autosomal Recessive Inheritance? correct answer: - Recessive Allele - Males and Females equally affected - Needs both alleles to be recessive to have trait - Having only one makes person a "carrier," no expression How do bad alleles happen? correct answer: - Mutations, change the genomic sequence...

What is a resource? correct answer: Any substance an organism requires to survive or reproduce. Ex) food, water, mates shelter, nutrients, oxygen/co2 What factors determine prey choice? correct answer: Energy content, encounter rate, handling time, search cost Profitability correct answer: (energy / handling time) animals = high profitability fruits/veggies = low profitability Why not grow to largest population size possible? correct answer: • Many die before having chance to re...

asexual reproduction correct answer: directing cells to divide and develop into new tissues and organs without a partner sexual reproduction correct answer: -takes more time and energy than asexual reproduction -genetically diverse offspring -requires fertilization -requires haploid gametes -mating most plants and animals produce_______ correct answer: gametes called eggs and sperm Meiosis correct answer: nuclear division that forms haploid cells Meiosis I correct answer: di...

The atmosphere is changing because: correct answer: carbon is being added faster than it is removed exponential growth curve correct answer: j-shaped curve showing the rapid increase in an exponentially growing population There are 1000 rabbits in a population that grows 10% per month. How many rabbits would you have after 120 months? correct answer: General Formula (exponential growth--no limit) Pop=(population)(growth rate)^number of months At 0 months, start with 1000 rabbits. At...

What type of trait is not useful to construct a phylogenetic tree? correct answer: Analogous traits Which of the following traits are not unique to humans among the great apes? correct answer: Lack of a tail How complete is the fossil record of life on earth? correct answer: It is an incomplete record of Earth's history What is a polyphyletic group of organisms? correct answer: A group that does not include a common ancestor. What is the biological species concept based on? corr...

How would you describe a flower that has petals, stamens, and carpels, but lacks sepals? correct answer: Perfect and Incomplete What trend in evolution of flowering plants has been attributed to insect pollination? correct answer: From radial to bilateral symmetry which of the following plant tissues is used for energy storage? correct answer: ground tissue which of the following terms could be used to describe all viruses as a group? correct answer: polyphyletic which form of tr...

Male Australian bowerbirds build and decorate elaborate structures, called bowers, out of grasses and other vegetation. If we want to understand how this behavior promotes a male bowerbird's ability to survive and reproduce, we want to understand its: correct answer: Adaptive function The figure below shows a ring species complex for seven populations of salamander. The seven populations are arranged around a low valley that the salamanders cannot cross. E. e. crocreator has a very specific...