BIO 106 LAB CHAPTER 8

Species diversity

A measurement that weighs each species on its abundance, accumulated with greater numbers of species

What is dominance to the microevolutionary process?

A rare dominant allele initially spreads faster than a rare recessive allele (for the same selection coefficient in each scenario).

The organism above contains stinging cells that allows it to catch prey and that also give the phylum its name. What are these cells called?

Cnidocytes

The body plan of cnidarians is composed of two cell layers, the epidermis (from ectoderm) and the gastrodermis (from endoderm). Therefore, these simple animals are triploblastic and have well developed organ systems.

False

What is/are proper way(s) to write the genus and species of people?

Homo sapiens Homo sapiens

Which of the following are(is) not (a) process(es) that result(s) in microevolution within a population? Isolation, i.e., lack of migration Mutation Genetic drift Phenotypic change in an individual ("plasticity") Selection

Phenotypic change in an individual ("plasticity")

Species richness

The count of the number of different species present in an area

Species evenness

The relative abundance of different species in an area

Which of these taxa is characteristically (almost entirely) parasitic? Platyhelminthes Turbellaria, e.g., planarians Trematoda Anthozoa Scyphozoa

Trematoda

Cnidarians are composed of tissues, but the tissues are not organized into discrete organs; therefore they exhibit a tissue level of organization. However, some Cnidarians, like the Portuguese Man O' War, have become colonial, with zooids specializing in various functions.

True

Sponges (Porifera) are said to have which level of organization?

cellular

Name the flagellated cells that line the sponge

choanocytes

What is this unique stinging cell called that is possessed by Cnidarians?

cnidocyte

Which of the following are typically included in the causes of microevolution? drift extinction Correct Answer mutation species richness selection

drift mutation selection

What is/are function(s) of the structure indicated by the arrow?

feeding

Referring to the figure below, is the frog more closely related to the _________.

human

Fill in the blank. A(n)_________ is an undirected change in the genetic material (DNA) of an organism.

mutation

Water flow is an important aspect of any sponge's life. The water flows in through the ____________, and out through the ____________.

ostia; osculum

What type of symmetry is exhibited by "B"

radial

What does cephalization mean?

the development of sense organs and nervous system control at the body's leading head.

Check two boxes: Identify the organism, and the part that is colored brown. uterus Clonorchis Schistosoma snails cercaria

uterus Clonorchis