You find a wormlike, soft-bodied adult animal in a mudflat. It is bilaterally symmetrical, is segmented, has a true coelom, and has a complete digestive tract. Based on these characteristics, what phylum does the animal represent?
A) Cnidaria
B) Platyhelminthes
C) Nematoda
D) Annelida
Answer: D
You might also like to view...
Which statement about cloning vectors is false?
a. Bacteriophage cloning vectors can accommodate DNA fragments up to 23 kb. b. Cloning vectors are molecules capable of transporting a DNA fragment into a cell. c. Plasmid cloning vectors can accommodate DNA fragments up to 20 kb. d. Bacterial artificial chromosomes can accommodate fragments up to 200 mb. e. Cosmid cloning vectors combine the features of both bacteriophages and plasmids.
Which of the following diseases is NOT caused by viruses?
a. The common cold and influenza b. Smallpox and mononucleosis c. Polio and rabies d. Aids and warts e. Diabetes
Which is a basic assumption made by scientists?
A. There are specific causes for naturally occurring events observed in the natural world. B. The causes for events in nature cannot be identified. C. There is one general rule or principle that can be used to describe all of nature. D. An event that occurs only once can be studied using the scientific method.
HIV spikes attach to CD4+ receptors found on
A) T helper cells. B) macrophages. C) dendritic cells. D) T helper cells and macrophages. E) T helper cells, macrophages, and dendritic cells.