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science chap. 7-8
| Question | Answer |
|---|---|
| all protists are ______, organisms that have cells with nuclei | eukaryotes |
| some protists are ______, some are ______, and some are ____ | heterotrophs, autotrophs, both |
| what are the three categories into which scientists group protists? | animal-like, plant-like, and fungus-like |
| what characteristic does animal-like protists share with animals? | heterotroph |
| another name for an animal-like protist is | protozoans |
| describe how a sarcodine, such as an ameba, gets food | by forming pseudopods |
| the cell part in an ameba that removes excess water. | contractile vacuole |
| Is the following sentence true or false? Paramecia have two nuclei | true |
| Is the following sentence true or false? Zooflagellates living in symbiosis always harm the animal in which they live. | false |
| Animal like protists called ___ are parasites that feed on the cells and body fluids of their hosts | sporozoans |
| Is the following sentence true or false? Sporozoans never have more than one host. | true |
| What is true about fungus like protists? | Like fungi, funguslike protists are heterotrophs funguslike protists use spores to reproduce |
| list the 3 types of funguslike protists | water molds downy mildews slime molds |
| Where do most water molds and downy mildews live? | In water or in moist places |
| each place where slime molds live | moist soil decaying plants in animals |
| plantlike protists are commonly called ___ | algae |
| Like plants plantlike protists are ____; they make their own food | autotrophs |
| True or false? a rapid increase in the population of algae never harms other organisms | false |
| what is true about saltwater algal blooms | saltwater algal blooms are commonly called red tides the water is red during a red tide because of toxins produced by the algae. Dinoflagellates and diatoms are two kinds of algae that often cause red tides. |
| List 2 conditions that often cause red tides to occur | increase in nutrients in the water increases in ocean temp. due to climate changes |
| Why are red tides dangerous to people and other organisms? | They are dangerous when the toxins that the algae produce become concentrated in the bodies of organisms that consume the algae |
| In a process called _____ nutrients such as nitrogen and phosphurus build up in a lake or pond over time causing an increase in the growth of algae. | eutrophication |
| Algae on teh water's surface prevent ____ from reaching plants and other algae underwater. These plants ____ and sink to the bottom. _____ that break down the remains of the dead plants increase in number and use up all the ___ in the water Fish and ot | sunlight die bacteria oxygen die oxygen |
| what is true about fungi? | most fungi are eukaryotes most fungo use spores to reproduce |
| what are 3 examples of fungi? | molds yeast mushrooms |
| the cells of fungi are arranged in branching, threadlike tubes called ____ | hyphae |
| true or false? fuzzy-looking molds that grow on food have hyphae that are packed tightly together | true |
| Describe the process by which fungus feeds | first the fungus grows hyphae into a food source. then digestive chemicals ooze from the hyphae into the food into small substances that can be absorbed by hyphae |
| true or false. some fungi are parasites | true |
| fungi most often reproduce by ___ | spores |
| yeast cells reproduce asexually in a process called ____ | budding |
| true or false? fungi reproduce sexually only when conditions become unfavorable | true |
| what two characteristics are used to classify fungi into groups | shape of spore ability to reproduce |
| what are the four groups of fungi? | threadlike club sac imperfect |
| fungi that are _____ break down the chemicals in dead organisms | decomposers |
| true or false? certain kinds of fungo cause diseases in plants and in humans | true |
| some molds produce ______ substances that kill bacteria | penicillin |
| how do some fungi help plants grow larger and healthier? | when the hyphae grows among the roots |
| an organism that consists of a fungus and either algae or autotrophic bacteria that live together in a mutualistic relationship is an _____. The fungus provides the algae or autotrophic bacteria with _______ the algae or autrophic bacteria with _____. the | lichen food produced by algae water minerals |
| asexual reproduction in yeast | budding |
| temporary bulges of the cell membrane that fill with cytoplasm to move an ameba | pseudopod |
| an interaction between two species where at least one of the species benefit | symbiosis |
| nutrients build up in a lake over time, causing an increase in algal growth | eutrophication |
| reproductive hyphae that grow out of a fungus | fruiting body |
| chemical that produces color | pigment |
| an interaction between 2 species where both partners benefit | mutualism |
| hairlike projections from cells that move with a wavelike pattern | cilia |
| the rapid growth of a population of algae | algal bloom |
Created by:
casonwest10