Show:
Evolution
Animal Diversity I
Animal Diversity II
Seedless Plants
Seed Plants
100
A group of organisms of the same species living in the same area at the same time
What is a population?
100
Class Turbellaria, Class Cestoda, and Class Trematoda
What is Phylum Platyhelminthes?
100
Clams, oysters, scallops and mussels
What is Class Bivalva
100
A process in which only one type of spore is produced
What is homospory?
100
A process in seed plants in which two types of sporangia produce two types of spores. Hint: Megaspore (female) Microspore (male)
What is heterospory?
200
Variation, overproduction, limits on population growth, and differential reproductive success
What are the four components of natural selection?
200
Marine organisms with multi-chambered shells and pseudopods
What are Foraminifera?
200
Excretory tubes in each segment that remove wastes from the blood and the coelom. (Hint: Phylum Annelida)
What are metanephridia?
200
The name for a small gametophyte found in ferns as a result of spore division
What is a prothallus?
200
Type of seed plant where leaves are reduced to thin needles which aid to reduce surface area to prevent water loss
What are Conifers?
300
-A population becomes geographically isolated from the rest of the species -Population evolves due genetic drift and differential selection pressures -More likely when population is small; greater effect on allele frequency
What is allopatric speciation?
300
What are some of the characteristics of the Phylum Porifera(Subkingdom Parazoa)?
-Sponges are the only members of the parazoa -No true body tissues -Spongocoel: central body cavity with single opening -Hermaphrodites: capable of producing both eggs and sperm
300
Compare centipedes and millipedes
Centipedes: Class Chilopoda. One pair of legs per segment Millipedes: Class Diplopoda. Two pairs of legs per segment
300
Waxy covering on aerial plant parts which prevents water loss due to dehydration
What is a cuticle?
300
A specialized shoot for reproduction. Can be unisexual or bisexual and can be borne singly or in groups.
What is a flower?
400
What is speciation? When does it occur?
Speciation is the evolution of new species. A population is considered a new species when it is sufficiently different from its ancestral species, and there is no genetic exchange between them.
400
Compare and contrast the two types of symmetry: Radiata and Bilateria
Radiata: "Diploblastic"-two cell layers (Epidermis and gastrodermis). Consists of 2 phyla--> Phylum Cnidaria and Phylum Ctenophora Bilateria: "Triploblastic"- three cell layers
400
How can you identify an organism in the Phylum Echinodermata? (List distinct characteristics)
Echinodermata means "Spiny Skin" -The larva is bilateral but the adult organism is pentaradial -It has a calcium carbonate endoskeleton -Water vascular system -Tube feet with ampulla for locomotion
400
Pteridophytes are seedless vascular plants. Name some plants that fall into this category. What role does vascular tissue play and what can it be divided into?
The vascular tissue provides support and nutrition for larger body plants. It can be subdivided into xylem and phloem. The xylem is for water, minerals and ions transport while the phloem is for sugar and organic molecule transport.
400
Define pollination. What is its role in coevolution? Name at least three types of pollination.
Pollination is "the transfer of pollen grains from anther to stigma". Due to the relationship between pollinators and plants it has affected the behavior and physical features of both the plant and pollinator. Bee pollination, Bat pollination, Wind pollination, Bird pollination, and Fly pollination
500
Define genetic drift. Compare and contrast the Bottleneck Effect and Founder Effect. Give a scenario of each.
Genetic drift is a random change in a population's allele frequency. Bottleneck Effect: Population may decrease due to environmental fluctuations-decrease in flood supply, increased predation, disease outbreaks, natural disasters. Founder Effect: A few individuals from a large population may branch out and colonize a new environment, such as an island which in turn will change the allele frequency.
500
Give at least 5 characteristics that define the Phylum Mollusca.
-Soft body, often with calcium carbonate shell -Muscular foot -Have visceral mass (contain body organs) -Have a mantle which is a sheet of tissue covering visceral mass, secretes shell -Have radula which is beltlike "teeth" used to scrape up food -Have open circulatory system known as hemocoel -Have true genders
500
Identify the 4 distinct characteristics of Phylum Choradata. Name at least 3 Classes
1) Dorsal hollow nerve cord 2) Pharyngeal Slits 3) Post ana tail 4) Notochord Class Chondricthyes, Class Actinopterygii, Class Amphibia, Class Reptilia, Class Aves, Class Mammalia
500
Using the words below construct a description of ferns. spores, sporophylls, sporangia, sori (singular: sorus)
Example: In Ferns spores are borne on special leaves called sporophylls. Sporangia are produced on the underside of sporophylls in clusters called sori.
500
Compare and contrast wind pollinated flowers, bird pollinated flowers, and bee pollinated flowers
In wind pollinated flowers, the flowers are small and odorless and the petals are reduced. In other words the flower does not have any features that can attract the pollinator. In bird pollinated flowers, the flowers are showy and colorful (reds, yellows and oranges). The flowers have abundant nectar and are odorless In bee pollinated flowers, the flowers have large, showy petals that are usually blue or yellow. They produce nectar to attract insects.