The observation that some modern humans contain Neanderthal DNA suggests _____________________ occurred between H. sapiens and Neanderthals
Fill in the blank(s) with correct word
interbreeding
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Vascular plants hydrate photosynthetic cells using _________, whereas bryophytes do soVascular plants hydrate photosynthetic cells using _________, whereas bryophytes do so using _____________
A. surface water; soil water B. soil water; surface water C. xylem; phloem D. xylem; surface water
A structure found in cells of all three domains, prokaryotes and eukaryotes, is the
A. cilium. B. ribosome. C. cell wall. D. mitochondria. E. chloroplast.
Which of the following is in contact with the soil into
which it is growing? a. vascular cylinder b. apical meristem c. root cap d. pericycle e. outer cortex
Isotopes are unstable and dissipate radioactive energy because they _____________
A. contain additional electrons in the electron orbital B. contain additional protons in the nucleus C. contain additional neutrons in the nucleus D. do not contain enough electrons in the electron orbital E. do not contain enough protons in the nucleus