A chemical found in urine that is produced from breaking down of proteins is called ___.

a. urea

b. glucose

c. folic acid

d. none of the above

Which three structures are found in both prokaryotic and eukaryotic cells? cytoplasm, endoplasmic reticulum, DNA O ribosomes, DNA, cytoplasm O nucleus, cell wall, cell membrane cell membrane, endoplasmic reticulum, ribosomes

2. I know that living things get their energy by

Similar structures are present in the embryos of fish, salamanders, turtles, chickens and pigs. In fish, these structures develop into gills but in the other organisms they either disappear or develop into other body parts later in embryonic

Match the following terms and definitions 1. gene 2. allele 3. trait 4. chromosome a thread-like molecule in the nucleus composed of DNA a genetic characteristic of the individual a portion of DNA which codes a specific heredity trait alternate

What type of reproduction shuffles genes? a. asexual b. binary fission c. budding d. sexual

Como são os anticorpos?

Scientists have been able to determine the composition of earths layers by:

Because he is now better-informed, jack wants to cook healthier meals. which recommendation should he avoid?

At which stage of meiosis does a pair of sister chromatids separate? A. Metaphase I B. Anaphase I C. Metaphase II D. Anaphase II

This is a species that provides structure to a community by creating locally stable conditions for other species.