Term
Which are barriers to pathogens at body surfaces?
a. intact skin and mucous membranes
b. tears and saliva
c. resident bacteria
d. all of the above |
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Definition
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Term
| What are molecules that macrophages recognize as self and will not elicit an immune response? |
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Definition
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Term
| Where are macrophages derived from? |
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Definition
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Term
| Immunoglobulins designate what to be involved in histamine release? |
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Definition
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Term
| Memory cells are ____________ that function in ____________. |
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Definition
| B cells; retaining the ability to make an antibody used to fight a previous infection |
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Term
| True or False: Eosinophils are the most abundant leukocytes (WBC) in blood. |
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Definition
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Term
| True or False: Inflammation is a non-specific immune response. |
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Definition
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Term
| True or False: T-cell lymphocytes originate and mature in the bone marrow. |
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Definition
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Term
| True or False: Activated complement system is a part of the first line of defense. |
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Definition
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Term
| True or False: Effector helper T-cells are needed for antibody mediated immune response. |
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Definition
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Term
Two species in the same habitat can coexist when they:
a. differ in their use of resources
b. share the same resource in different ways
c. use the same resource at different times
d. all of the above |
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Definition
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Term
Which of the following is not a tupe of symbiosis?
a. predation
b. parasitism
c. commensalism
d. mutualism |
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Definition
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Term
The brown headed cowbird is an example of a:
a. microparasite
b. hemiparasite
c. social parasite
d. all of the above |
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Definition
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Term
| The revegetation of the area that was burnt by the recent fires is an example of |
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Definition
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Term
| True or False: Lice are ectoparasites. |
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Definition
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Term
| True or False: Mistletoe is an example of a hemiparasite. |
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Definition
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Term
| True or False: In commensalism both species benefit. |
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Definition
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Term
| True or False: Biodiversity tends to be higher in the polar regions and lower in the tropics. |
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Definition
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Term
| Lateral roots are the product of the |
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Definition
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Term
Stomata are responsible for:
a. water escape from the leaves
b. carbon dioxide entry
c. mineral absorption
d. a & b
e. b & c |
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Definition
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Term
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Definition
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Term
| What is a source of primary growth (lengthwise)? |
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Definition
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Term
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Definition
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Term
| What is a source of secondary growth (girthwise)? |
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Definition
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Term
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Definition
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Term
| True or False: Procambium gives rise to vascular tissue. |
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Definition
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Term
| True or False: Monocots have netlike leaf veins. |
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Definition
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Term
| True or False: Parenchyma is dermal tissue. |
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Definition
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Term
| True or False: Dicots have tap root system. |
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Definition
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Term
| What promotes plant growth? |
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Definition
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Term
| What promotes fruit ripening? |
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Definition
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Term
| What inhibits plant growth? |
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Definition
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Term
In which replication pathway do bacteriophage infect and quickly lose their hose?
a. lysogenic pathway
b. lytic pathway
c. a & b
d. none of the above |
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Definition
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Term
| What are bacterial cell walls mainly composed of? |
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Definition
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Term
| What do bacteria reproduce by? |
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Definition
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Term
| When conditions are unfavorable, some bacteria, such as the one that causes botulism, are able to assume a protected form, resistant to extreme environments. What are these resistant forms called? |
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Definition
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Term
| True or False: Bacterium, which has spherical shape, is called bacillus. |
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Definition
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Term
| True or False: Prokaryotes' single chromosome is circular. |
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Definition
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Term
| Sickle cell disease illustrates a balanced polymorphism because carriers are resistant to |
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Definition
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Term
Forces that change allele frequencies include:
a. natural selection
b. migration
c. genetic drift
d. mutation
e. all of the above |
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Definition
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Term
| A ______________ occurs when many members of a population die and only a few are left, by chance, to replenish the numbers in that population. |
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Definition
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Term
Albinism is uncommon in the United States but affects 1/200 Hopi Indians. A contributing factor for this high increase is:
a. nonrandom mating
b. migration
c. genetic drift
d. cline |
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Definition
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Term
| True or False: If a population migrates and picks up new individuals, allele frequencies can change. |
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Definition
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Term
| True or False: Founder effect and population bottlenecks are both examples of genetic drift. |
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Definition
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Term
| True or False: Small scale shifts in allele frequencies is the defining characteristic of microevolution. |
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Definition
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Term
| True or False: A population is a group of interbreeding members of the same species in a particular area. |
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Definition
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