An astronaut visits Mars and discovers and unknown alien body. The astronaut studies it to determine if it is living and notices the following things about it: it is made of cells
it can reproduce
it does not grow or develop
it does not maintain homeostasis
it can adapt to its surroundings
it uses energy
Based on these observations, is this alien body living or not?

Question 1 options:

it is living because it met most of the characteristics of life

it can't be determined based on the accepted definition of life

it is non-living because it does not meet all the characteristics of life

it is living because it has all the characteristics of life

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids

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