Organisms are classified as eukaryotes or prokaryotes based on their basic body structure. which of the following is true of organisms and the type of genetic information they contain?
question 9 options:
both eukaryotes and prokaryotes contain dna enclosed in membrane-bound nuclei
both eukaryotes and prokaryotes contain dna, but prokaryotes typically only have a single, circular chromosome
all eukaryotes and most prokaryotes contain dna, but archaebacteria only contain rna
all eukaryotes contain dna, and all prokaryotes contain only rna
the flowering plant known as the snapdragon produces white, yellow, and crimson flowers. when a snapdragon that is homozygous for the gene for white flowers is crossed with a crimson snapdragon that is homozygous for the gene for crimson flowers, heterozygous offspring with pink flowers are produced. which of the following terms correctly describes this phenomenon?
question 17 options:
mendelian inheritance
polygenic inheritance
pleiotropy
incomplete dominance
punctuated equilibrium and gradualism are both models for evolutionary change, but they are very different theories. which of the following statements is true of the evolutionary theory known as gradualism?
question 19 options:
several closely related species from isolated populations evolve rapidly
fossils showing intermediate changes will not necessarily be found
evolution occurs in spurts of rapid change
speciation occurs gradually
Answers: 1
Biology, 22.06.2019 00:00
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.
Answers: 2
Biology, 22.06.2019 10:30
The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere
Answers: 1
Biology, 22.06.2019 14:00
The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. what area of the spinal cord is destroyed
Answers: 3
Biology, 22.06.2019 17:00
Drag the labels to the correct location in the equation. not all labels will be used (1 kilometer = 1,000 meters, 1 hour = 60 minutes, 1 minute = 60 seconds) complete the steps necessary to convert 55 kilometers per hour to meters per second, min 60 1,000 15.28100 sec min 55 km 1 hour 5fhkem x 4 km] m x 1 hourin xoo1 min 1 km sec reset next
Answers: 1
Organisms are classified as eukaryotes or prokaryotes based on their basic body structure. which of...
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