Can you identify the key changes that occurred during hominid evolution?
2.7 mya Neanderthal lives in woods and grasslands, has massive jaws for chewing on roots and vegetation.
2.5 mya Hominids start to use stone tools regularly, develop a brain 850 cm'.
Between 4-6 mya ape-hominin transitional species adopted bipedalism.
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1.8 mya Homo erectus is found in Asia. First true hunter-gatherer ancestor, first to migrate out of Africa in
large numbers and attains a brain size of around 1000 cm
Australopithecus had a combination of humanlike and apelike traits: they were bipedal but had small
brains.
Homo habilis appears to be intermediate in terms of evolutionary development between the primitive
Australopithecus and the more advanced Homo species.
1.5 mya Homo Heidelbergensis lives in Africa and Europe. Similar brain capacity to modern humans.

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Experiments in environmental toxicology can sometimes be manipulative experiments in which the researcher actively chooses and manipulates the independent variable. in hunt's study, for example, dosages of bpa were manipulated and the effects were measured. in manipulative studies, the researcher controls all the other variables in the experiment, so any health effects observed in the test subjects can be attributed to differences in the independent variable. in other cases, researchers use natural experiments in which the dependent variable (typically a measure of organism health) is measured under differing contexts that are not manipulated. say, for example, that an accidental chemical spill contaminates five ponds. to determine the possible effects of the toxic chemical on frogs, a researcher could compare the hatching rate of frog eggs laid in those five ponds to the hatching rate of eggs laid in five uncontaminated ponds nearby. this would be an example of a natural experiment because concentrations of the toxic chemical in the ponds were not controlled by the experimenter, but rather resulted from the chemical spill. drag type of experiment on the left to the example of experiment on the right. blood concentrations of bpa in college students are compared to their recent manipulative consumption of canned food items 2. the feeding behavior of fish in streams that receive acidic runoff from strip mines is compared to the feeding behavior of fish in unaffected streams. the deformity rate in baby birds from nests in pesticide-sprayed fields is compared to the deformity rate in birds from nests in unsprayed fields 4 tumor development is compared in mice exposed to five dosages of a known carcinogen in the laboratory foraging activity levels are compared in tadpoles exposed to four concentrations of toxic metals in the laboratory. growth of corn plants is compared in field plots sprayed with three different dosage: s of weed killer 7 bpa concentrations in the urine of people with diabetes are compared to bpa concentrations in the urine of people without diabetes - natural; manipulative