Your cardiovascular system is made up of the heart and blood vessels (arteries, capillaries, veins).
C. Hunting wolves. The rest either hurt the North American deer population or did not affect it at all.
They have different versions of the gene for bristle thickness that connect together to make the bristle thickness in general.
It’s like when you have 6 toothpicks and combine two together, you’ll have 1 really thick one and the others will be small.
A statistic used in the fields of breeding and genetics that estimates the degree of variation in a phenotypic trait in a population that is due to genetic variation between individuals in that population.
Answer:
“Stromatolites are pervasive in the fossil record and are some of our earliest examples of life on Earth,” he says. “The microbial mats that created them were predominantly made up of cyanobacteria, which used photosynthesis – like plants do – to turn sunlight into energy while producing so much oxygen over time they changed the early Earth’s atmosphere to make it habitable for complex life.