Question

the chart below contains information about some structures found in single - celled organisms. cell structures

structure	function
flagellum	movement
chloroplast	food production

3 the information in this chart best illustrates the biological concept that (1) all single - celled organisms contain contractile vacuoles, a flagellum, and chloroplasts (2) single - celled organisms contain structures that function in maintaining homeostasis (3) the organs found in complex organisms evolved from these three structures (4) multicellular organisms do not contain any cell structures
structures in an animal cell are represented in the model below.
4 which answer choice correctly identifies the functions of structures a, b, and c? (1) structure a = waste removal; structure b = extract energy from nutrients; structure c = protein synthesis (2) structure a = information storage; structure b = transport of materials; structure c = storage of liquids (3) structure a = protein synthesis; structure b = storage of wastes; structure c = reproduction (4) structure a = cell communication; structure b = transport of materials; structure c = waste removal

Explanation:

For question 3, single - celled organisms have structures like contractile vacuoles for water balance (homeostasis), flagellum for movement, and chloroplasts for food production, which shows they have structures for maintaining homeostasis. Not all single - celled organisms have all three structures, and complex organism organs did not evolve just from these three, and multicellular organisms have cell structures.
For question 4, assuming common animal cell structures, mitochondria (similar to what could be structure B) extract energy from nutrients, and the nucleus (similar to structure C) is involved in protein synthesis (through DNA - related processes) and waste removal is not a typical function of the nucleus. Cell membrane (could be structure A) is involved in cell communication.

Answer:

1. (2) single - celled organisms contain structures that function in maintaining homeostasis
2. (1) Structure A = waste removal; Structure B = extract energy from nutrients; Structure C = protein synthesis