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The left and right hemispheres of the brain are linked by tracts that cross in the area called the:
Q25: The _ are fungi that have lost
Q31: How have humans intruded into the global
Q33: Choose the most effective means of birth
Q36: The veins leading from the lungs to
Q37: The chemical signal sent out by macrophages
Q37: The first vertebrates to invade land were:<br>A)amphibians<br>B)birds<br>C)reptiles<br>D)arthropods
Q42: Which of the following scientists studied bees
Q45: List the two principal types of cells
Q48: Which phyla do ferns belong to?<br>A)Lycophyta<br>B)Pterophyta<br>C)Gnetophyta<br>D)Ginkgophyta<br>E)Arthophyta
Q50: The first seed plants were the:<br>A)ferns<br>B)gymnosperms<br>C)angiosperms<br>D)monocots