Xx - female. Xy - male. egg already has an X chromosome so it depends on the other. If second one is X than it's a girl. If Y - a boy
The most common cause of anemia is iron deficiency.
3,000 kilijoules.
You go from 300,000 at the first trophic level to 30,000 at the second trophic level, and finally 3,000 at teh third.
Speciation! Speciation occurs when a single species becomes two or more separate populations by a geographical barrier. This changes each population’s environment which forces them to adapt. Eventually these populations will become so different from each other that they will not be able to interbreed populations and create fertile offspring. This is what makes them different species, but they still share a common ancestor.
Name the five layers of epidermis. Which layer is found only in thick skin? Superficial to deep: Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale
