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The study of Biology may seem overwhelming at times due to the complexity and diversity of life. However, Biologists utilize some methods intended to improve organization and ease communication about living organisms. One of these is the development of phylogenetic trees. Evidence from many sources indicates that all life on Earth are genetically related. In this discussion board, please include the following: Describe what kinds of evidence are used to construct a phylogenetic tree and, in your own words, what this tree represents. Analyze which evidence provides the most accurate information on which to build a phylogenetic tree. What is the organism Tiktaalik roseae and how has it helped us understand the origins of animal life. Are humans part of this overall description of these relationships? who are the closest relatives to humans? How do we know that?
While hairless hamsters are mated with normal haired hamsters, about one-half the offspring are hairless and one-half are normal. When hairless hamsters are crossed with each other, ratio of normal-haired to hairless is 1:2. How do you account for re..
Which of statements concerning the sperm might be true. These data let you to infer that the species belongs to which protist groups.
Discuss how the villus the functional unit of the small intestine? In your answer, include a discussion of its structure and function and the enzymes discovered there.
Recent evidence shows that the individual chromosomes occupy fairly defined territories within the nucleus. Given the structure and location of parts of the nucleus, which would be more probably involved in chromosome location.
The time-of-entry mapping method was used to determine the first five markers transferred from each Hfr during a synchronized conjugation experiment. The markers and their transfer order form each Hfr are shown below.
Explain the main types of extracellular signaling.
Most people with Broca's aphasia suffer from partial paralysis on the right side of body. Most people with Wernicke's aphasia do not. Why.
NASA hopes they may one day be useful in producing some electricity on a spacecraft. What mode of nutrition do these bacteria most likely use.
Glucose and sucrose showed a reaction. Lactose and galactose didn't. Why?Glucose and sucrose easily made alcohol.
Examine the major stages of sea urchin development with reference to your series of detailed drawings and observational notes. How did the embryonic cells compare in size with the original gamete cells? State reasons such a difference may exist.
As Ben jumped on his bike and headed for the fresh water lake, his mom called after him, "Don't swim if we have an electrical storm-it looks threatening". That was a valid request. Why with reason.
An inversion heterozygote possesses a normal chromosome and one with an inversion. The gene orders in these 2 chromosomes are shown below- Normal 1 2 3 4 5 6 7 8 9 10 o.
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