Answer: D) There are no fossils of dinosaurs in rocks above the iridium layer.
Explanation: i’m not good at explaining but the meteorite which caused mass extinction to dinosaurs left behind iridium. if there was a mass extinction, then there is no more dinosaurs and there won’t be any fossils left of them to be found above of the iridium layer as they are allllll gone. good luck with school everyone!
It was for a faster route to the united states, so it is b
Recent studies on giraffes across Africa suggest that they constitute<u> four</u> different species.
<h3><u>What various giraffe species are there?</u></h3>
Genetics underlies the differentiation between a species and a subspecies. A new species is distinguished from a subspecies when there are sufficiently large genetic differences between groups of the same species that prevent individuals from the two species from mating and conceiving viable offspring.
In other words, no other group of animals can be used to replicate the gene pool of a species because it is wholly unique to that group of animals. The southern giraffe population is increasing, in contrast to the other three giraffe species. A subspecies of the southern giraffe, the Angolan giraffe is mostly found in Namibia and Botswana.
An additional subspecies, the South African giraffe, is found in portions of Botswana, Zimbabwe, Angola, Zambia, South Africa, and Mozambique.
Learn more about the species of giraffe with the help of the given link:
brainly.com/question/16208755
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The number of black slaves was less. The population as a whole of black slaves grew. A lot of the soil was bad from over-planting so there was less of a demand for slaves thus some would become free.<span />
