The secretions of the ________ contain fructose and prostaglandins
Fill in the blank(s) with correct word
seminal vesicles
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Early development in Drosophila includes nuclear division, but not cell division. This gives rise to a single cell with many nuclei
A. true B. false
A ________ epidemic is characterized by a sharp rise to a peak then a rapid, but not as pronounced, decline in the number of individuals infected.
A. common-source B. sporadic C. herd D. propagated
Answer the following statements true (T) or false (F)
1. Of the 20 amino acids in all organisms, essential amino acids are obtained by food consumption. 2. If a protein is denatured, its structure has been changed enough to make the protein nonfunctional. 3. Proteins store the genetic information of the cell and transmit it to the next generation. 4. When Herceptin medication is used to stop the excessive action of receptor proteins in breast cancer cells, slowing their division, the receptor proteins are within the cell nucleus where the cell is regulated. 5. Endosymbiosis theory is proposed in large part because of the resemblance of mitochondria and chloroplast structures to prokaryotes.
Because the mechanisms of the origin of life left no record, what would be the best approach to solving the mystery of the origin of life?
a. Identify the sequence of evolutionary events leading to the first life-form on Earth. b. Using a mathematical approach, determine the probability of rare evolutionary events occurring. c. Assume that life evolved in a series of steps with sharp boundaries and attempt to identify each step. d. Develop a hypothetical scenario and conduct laboratory investigations to determine if the scenario is chemically and biologically possible and plausible. e. Assume that life on Earth arrived from space and work forward.