Download Chapter 28 and 31 | BIOL 112 - Intgrtve Biol:Orgnsm,Ecol,Evol and more Quizzes Biology in PDF only on Docsity!
Describe the different nutritional strategies of
protists.
Protists can exhibit autotrophy, heterotrophy, or both in some cases (known as mixotrophy). TERM 2
Autotrophy
DEFINITION 2 Autotrophy is the ability to be self-sustained by producing food from inorganic compounds. TERM 3
Heterotrophy
DEFINITION 3 A heterotroph (; heteros = "another", "different" and trophe = "nutrition") is an organism that cannot fix carbon and uses organic carbon for growth. TERM 4
Mixotrophy
DEFINITION 4 A mixotroph is a microorganism that can use a mix of different sources of energy and carbon. TERM 5
Describe the reproductive cycles of ciliates
and the role of the two types of nuclei found
in these protists
DEFINITION 5 They have large macronuclei and small micronuclei The micronuclei function during conjugation, a sexual process that produces genetic variation
micronuclei
A micronucleus is the smaller nucleus in ciliate protozoans, such as the paramecium. TERM 7
macronuclei
DEFINITION 7 A macronucleus (formerly also meganucleus) is the larger type of nucleus in ciliates. TERM 8
ciliates
DEFINITION 8 The ciliates are a group of protozoans characterized by the presence of hair-like organelles called cilia, which are identical in structure to flagella but typically shorter and present in much larger numbers with a different undulating pattern than flagella. TERM 9
Describe and name of the different stages
within the alternation of generations life cycle
in multicellular algae.
DEFINITION 9 Definition TERM 10
alternation of generations
DEFINITION 10 Alternation of generations (also known as alternation of phases or metagenesis) is a term primarily used in describing the life cycle of plants (taken here to mean the Archaeplastida).
