Sickle-cell anemia is a genetic disorder in which red blood cells take on an abnormal crescent shape. people who do not have sickle-cell anemia possess the following nucleotide and amino acid sequences: ctg act cct gag gag aag tct leu thr pro glu glu lys ser people who do have sickle-cell anemia possess the following nucleotide and amino acid sequences: ctg act cct gtg gag aag tct leu thr pro val glu lys ser sickle-cell anemia is an example of -- a. crossing-over. b. a gene mutation. c. nondisjunction. d. a chromosomal mutation.

Select all the correct answers. lactobacillus is a bacteria that live inside humans. these bacteria live on the nutrients from our bodies. they to keep our gut clean and healthy. s. typhi is a bacteria that enter our bodies through contaminated food. this bacteria causes infections in the body. based on this information, which two statements about the association between these bacteria and humans are true? a. lactobacillus shares a parasitic relationship with humans. b. s .typhi shares a parasitic relationship with humans. c. both lactobacillus and s. typhi share a parasitic relationship with humans. d. both lactobacillus and s. typhi share a mutualistic relationship with humans. e. lactobacillus shares a mutualistic relationship with humans, and s. typhi shares a parasitic relationship multiply chrse

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

In this assignment, you will analyze an example of speciation by researching the finches of the galapagos islands. then you will answer questions to construct explanations and draw conclusions based on the information you gather. someone plz !