Answer the following questions true (T) or false (F)
1. Most species of sponges live in freshwater environments, but a few species are marine.
2. Cnidarians such as jellyfish have muscle and nervous tissues.
3. Annelids demonstrate the important animal characteristic of body segmentation.
1. FALSE
2. TRUE
3. TRUE
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Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum from a roundworm?
A) four B) two C) eight D) a diploid number
North America is currently experiencing an unprecedented and rapid loss of species. What is believed to be the main trigger of such events, either directly or indirectly?
A) continental drift B) increased human population C) climate change D) increased predation by wild carnivores
Two types of vaccines for polio have been developed, an inactivated whole (IPV ) and a live attenuated (OPV ) vaccine. Compare and contrast the advantages and disadvantages of the two polio vaccines
What will be an ideal response?
Which of the following is NOT a characteristic of protozoa?
A) Most exhibit asexual reproduction. B) They are single-celled organisms. C) They are eukaryotic organisms. D) They are all photosynthetic. E) They frequently possess cilia or flagella.