stuff i got wrong/need more review Flashcards
A cell from a tadpole embryo’s eye was removed and then placed onto its tail region. This resulted in surrounding cells of that region of the tail differentiating into corneal cells. What term best describes this phenomenon?
Induction
Induction
describes the embryonic process in which one group of cells influences what neighboring immature cells become in the future
Metaplasia
transformation of one differentiated somatic cell type to another differentiated somatic cell type
Dysplasia
presence of any of the various types of abnormal cells within a tissue or organ, can be a precursor to cancerous growth
Cell plasticity
describes the ability of some cells to take on the characteristics of other cells in an organism - ex: adult bone marrow cells to convert to cells of other tissues
Metamorphosis
describes an abrupt and conspicuous change in animals after birth or hatching
Which technique determines which genes are actively expressed in a cell?
DNA microarray
Gel electrophoresis allows you to:
separate macromolecules (DNA, RNA, proteins) by size and charge
ELISA
technology to determine if a specific antigen exists
Karyotyping
Tool to count the number of chromosomes in a cell
What adaptations do herbivores have that aid them with their diet that carnivores do not have?
Large cecum and long intestines - since they eat a lot of cellulose (fiber) compared to carnivores
Which of the following is an example of negative feedback?
A. Regulation of blood pH
B. Rising levels of estrogen stimulate a surge of luteinizing hormone
C. Blood platelet accumulation in blood vessels
D. Release of oxytocin during childbirth
E. Release of oxytocin during lactation
A. Regulation of blood pH
A species of plant from Wyoming is artificially introduced to a marsh in New Jersey. It manages to reproduce and maintain a population, and is not disruptive to surrounding plant communities. How should this plant be categorized?
Naturalized
What is a naturalized species?
non-native species that spreads beyond the place of introduction, and whose introduction is sufficient to maintain its population.
True or false: naturalized species can become invasive
True - if they become sufficiently abundant to have an adverse effect on native plants and animals
What is a non-native species?
A species that lives outside its native distributional range, but arrived there by human activity (deliberately or accidentally)
Some non-native species called ____ ____ have a substantial negative effect on the local ecosystem
invasive species
Exotic species
also known as a non-native species
Desmosomes is a type of:
anchoring junction
Desmosomes allow adhesion of:
cell to cell
Hemidesmosomes allow adhesion of:
cell to extracellular matrix
Which of the following is NOT a characteristic of Chordata? A. Post-anal tail B. Notochord C. Diploblastic D. Pharyngeal gill slits
B. Diploblastic
Chordata is characterized as?
bilateral triploblastic deuterostomes
Triploblastic organisms have ___ germ layers:
three; endoderm, mesoderm, ectoderm