As biotechnology has improved, scientists are able to look more closely at dna, the molecules that hold genetic instructions for development, reproduction, and functioning. the ability to study dna closely allows scientists to find evidence of genetic mutation and better understand the effects of these changes. think about how genetic mutations can be harmful, beneficial, or cause no change at all.
answer choices:
-a mutation in the hemoglobin gene can result in sickle cell anemia.
-a mutation that could cause a genetic disorder gets repaired by enzymes before an altered protein is produced.
-over time, a population of green lizards that live in a desert with white sand become much lighter in color.
-a mutation of a protein results result in protection against a destructive bacteria.
-a mutation occurs in a non-coding portion of dna and does not change the amino acid sequence of a protein.
-an extra copy of a human chromosome results in a child born with down's syndrome.

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

You decide that the introduction should also discuss the extremophiles that are referred to as the archaea. these single-cell organisms are considered "extremophiles" due to their ability to survive and reproduce in environmental conditions that would be hostile for most living organisms. archaea species have been isolated from highly acidic sulfur springs, ocean floor thermal vents with temperatures that exceed boiling, and subarctic ice well below freezing. while still considered to be prokaryotic, the archaea have numerous differences that place them apart from the bacteria. choose the characteristics that separate the archaea from other prokaryotic cells. select all that apply. view available hint(s) select all that apply. archaea lack true peptidoglycan in their cell walls. the morphology of the cell is rigid and is geometric in shape, similar to a sphere or cylinder. the cytoplasmic membrane lipids of archaea have branched or ringform hydrocarbon chains. all currently identified and characterized archaea have been linked as the causative agent to an animal or human disease.

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.