PART 3: BIOGEOCHEMICAL CYCLES: NITROGEN Make a simple sketch of the nitrogen cycle below. Match the following processes with the correct letter
Processes : Ammonification Assimilation, Denitrification, Nitrification, & Nitrogen Fixation
nitrogen (N) in atmosphere
D
amino acids
and proteins in
plants and animals
08
dead animals
and plants
nitrate ions
bacteria in
root nodules of
legumes
INO,
080decomposers
bacteria in sol
ammonium ions INH,
A
B
D
E

You will create a molecular clock model for an arthropod gene. follow these guidelines to make your model: . your timeline will span from 90 million years ago to the present. the common ancestor in your model is an arthropod that lived 90 million years ago. the gene that you'll track codes for a protein in the species venom . the dna sequence youll track contains 10 nitrogen bases. you can choose the order of the bases and where the mutations occur. this gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. to build your model,/ calculate the estimated time period it takes for 1 base pair to mutate. the first time period will only show the common ancestor. at the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences. the first and third descendant species will survive for the rest of the timeline. the second descendant species was extinct 50 million years ago. calculate how long it will take for one full base pair mutation to occur. explain your reasoning by constructing a mathematical equation

Which factor affects the force of gravity between objects? check all that apply. direction distance mass shape time

Which of the following statements about polysaccharides are correct? choose all that apply. cellulose is a linear, unbranched polymer of glucose monomers. starch is typically more highly branched than glycogen. cellulose is a major component of both plant and animal cells. glycogen is a storage form of glucose in animal cells. glycogen is the most abundant organic compound on earth. starch and cellulose are found in plants.