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All organisms need nutrients for survival and make waste. In this respect, all organisms interact in some way with their environment. Please compare the way in which humans and sponges obtain nutrients from their environment. For this question, I would like you to make a flow chart for each organism demonstrating the flow of food particles through the organism. Please include the name of the specialized cells, tissues, or organs along the way through the organism. You will also want to include what happens at each of these "stops" along the way.
In eukaryotes, a gene may contain internal sequences that are removed in the RNA, and therefore do not contribute to the protein sequence. What are theses sequences called and how and when are they deleted?
How does the mechanism of heredity work ? or How do these Traits get Expressed ? (this is same question )
The prothalli are bisexual, free-living and photosynthetic. At maturity, the prothallus is flat and heart-shaped. Inspect the lower surface for rhizoids, antheridia and archegonia. What is the function of each of these structures.
In supine (laying down) position, a human being's heart rate is elevated to (105 beats/min). Why? Why human being's heart rate is even more elevated to (135 beats/min) in upright (standing) position? Explain the mechanism here.
Briefly compare similarties in the release of the contents of cortical granules during the fertilization of the sea urchin ovum, with the release of neurotransmitters from terminal knobs of a stimulated neuron.
you count 13 bacterial cells in the smallest square of a hemocytometer culture was diluted 1:5 prior to placing a sample on the hemocytometer. what is the density of the original undiluted culture?
Two species of garter snakes live in the same geographic area. One generally lives in water and the other mainly on land, so that they rarely encounter each other and do not interbreed. This is an example of what category of genetic isolation.
A protein that tests disulfide positive is oxidized. Spectrophotometry readings are taken for both unoxidized and oxidized protein.
Explain the function of aminoacyl-tRNA-synthetase and why it is important that this enzyme is perfectly accurate in its recognition of tRNAs and amino acids.
Assume you have two cell lines named ViRa and SaSi growing in your lab. ViRa is susceptible to poliovirus infection, but is not permissive,
Assume you are given an isolated muscle with its motor nerve intact. The preparation permits you to make electrophysiological measurements from the nerve
Prader-Willi syndrome is caused by the deletion of the paternal copy of a small section of human chromosome fifteen. In normal individuals, only the paternal copies of the genes in this section of chromosome fifteen are expressed;
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