Look at the leaves on these plants. Which pair of sentences about the leaves is true?

All of the leaves are the same shape. All of the leaves help make food.

All of the leaves are the same shape. Some of the leaves help make food.

Some of the leaves are the same shape. All of the leaves help make food.

Some of the leaves are the same shape. Some of the leaves help make food

What is the next step in the process after a substrate enters the active site of an enzyme

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

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