Question

1 multiple choice 1 point which of the following statements is true? organisms such as yeast may be used as models for the study of genes that affect human development and disease. none of the suggested answers are true. only mammals are useful as model systems for studying human traits, because mammals are most closely related to humans. protista are too evolutionarily removed from humans to teach us anything valuable about human genetics. 2 multiple choice 1 point which kingdom contains both heterotrophic and autotrophic unicellular organisms? fungi animalia protista plantae 3 multiple choice 1 point which list is correct in descending classification (from largest to smallest grouping)? domain, phylum, kingdom, species kingdom, order, phylum, species phylum, family, class, genus kingdom, order, family, species 4 multiple choice 1 point which group of organisms contains some organisms that consist of more than one cell? archaea eubacteria eukarya

Explanation:

1.

• Yeast (a fungus) is a model organism. Many genes in yeast have homologs in humans, and studying yeast can provide insights into human gene - related processes like development and disease.
• Mammals are not the only model systems. For example, Drosophila (fruit fly, an insect) is also widely used.
• Protista can have genetic similarities with humans and can teach us about human genetics.

• Fungi are mainly heterotrophic.
• Animalia are heterotrophic.
• Plantae are mainly autotrophic (though some are parasitic and heterotrophic in part, but unicellular plants are mainly autotrophic).
• Protista contains both autotrophic (e.g., algae) and heterotrophic (e.g., amoeba) unicellular organisms.

• The taxonomic hierarchy from largest to smallest is: domain > kingdom > phylum > class > order > family > genus > species.
• For the option “domain, phylum, kingdom, species”, the correct order should be domain > kingdom > phylum.
• For “kingdom, order, phylum, species”, the correct order is kingdom > phylum > order.
• For “phylum, family, class, genus”, the correct order is phylum > class > family.

Answer:

Organisms such as yeast may be used as models for the study of genes that affect human development and disease.

2.