A form of learning that occurs during a genetically determined time period is called ________
a. observational learning
b. imprinting
c. a fixed action pattern
d. instinct
b
You might also like to view...
What can scientists study to gain a better understanding of prokaryotic life on Earth millions—if not billions—of years ago?
A. microfossils of bacteria B. stromatolites and sediments C. carbon isotopes in limestone D. molecular (lipid) fossils E. All of these answer options are correct.
In sexual reproduction in ciliates the sequence of events is
A. (1) In the pair of conjugating cells, the micronuclei undergo mitosis to produce four diploid micronuclei. All but one of these micronuclei disintegrate. (2) The remaining micronucleus undergoes meiosis to produce two. (3) One micronucleus stays in the parent cell and the other moves to the opposite cell while the macronucleus in each cell disintegrates. (4) The cells separate, each with two nuclei. (5) One haploid micronucleus in each cell forms a new haploid macronucleus and the other divides mitotically to form eight new haploid micronuclei. (6) The two haploid macronuclei fuse to form a diploid one and the eight haploid micronuclei fuse by pairs into four diploid micronuclei. B. (1) In each conjugating cell, the micronucleus undergoes meiosis to produce four haploid micronuclei, of which three disintegrate. (2) The remaining micronucleus undergoes mitosis to produce two. (3) One micronucleus stays in the parent cell and the other moves to the opposite cell while the macronucleus in each cell disintegrates. (4) The cells separate, each with two nuclei, one of its own and one from its conjugant. (5) The two haploid micronuclei in each cell fuse to form a diploid micronucleus. (6) The diploid micronucleus divides mitotically, producing four diploid macronuclei and four micronuclei. C. (1) In each conjugating cell, the macronucleus and micronucleus undergo meiosis. One haploid macronucleus and micronucleus disintegrate in each cell. (2) The remaining nuclei undergo mitosis to produce two macronuclei and two micronuclei. (3) One set of nuclei stays in the parent cell and the other moves to the opposite cell. (4) The cells separate, each with two sets of nuclei, one of its own and one from its conjugant. (5) The two haploid micronuclei in each cell fuse to form a diploid micronucleus, and the two macronuclei fuse to form a diploid macronucleus. (6) The diploid nuclei mitotically, producing four diploid macronuclei and four micronuclei.
The development of multicellular organisms likely originated
a. from colonies of unicellular organisms of the same species. b. from endocytosis of other cells followed by mitosis. c. from cooperation between different species of cells. d. from colonies of numerous species of cells. e. from endosymbiotic eukaryotes.
There are two main subgroups of primates: the wet-nosed primates (Strepsirrhini) and the dry-nosed primates (Haplorhini). Which of the following belong to the subgroup with a wet nose and a fixed upper lip?
1.apes 2.humans 3.lemurs 4.monkeys