Which of the following is not part of a nucleic acid? nitrogen-containing base phosphate group five-carbon sugar (deoxyribose or ribose) amino acid Which of the following can catalyze reactions and perform other activities in a cell? Nucleic Acid Protein Lipid Carbohydrate Which listed characteristic do most lipids have in common? absence of phosphorous most chemical bonds are polar soluble in water insoluble in water Carbon, pictured here, is considered versatile when it comes to bonding with other atoms and making important compounds. Which feature of carbon most contributes to this versatility? Carbon has 2 electrons in the first electron shell. Carbon is very stable Carbon can share its four outermost electrons with other atoms. Carbon has two vacancies in its outer shell. Carbon has extra electrons and therefore has a negative charge. their outermost shell is filled to capacity they have equal numbers of protons and neutrons they have a positive charge. they have a negative charge. Which of the interactions below constitute an ecosystem? Community and biotic factors Community and environment Population and weather Population and community A cell has a nucleus. To what group does this cell belong? Virus Bacteria E. coli Eukaryote Prokaryotes: evolved after eukaryotes lack a nucleus lack a plasma membrane are multicellular Which of the following organization levels is NOT studied by ecologists? populations ecosystems communities individuals genomes The mitochondria in eukaryotes may have evolved from : parasitic viruses a fusion of chloroplasts symbiotic bacteria a fusion of ribosomes The mitochondria in eukaryotes may have evolved from : parasitic viruses a fusion of chloroplasts symbiotic bacteria a fusion of ribosomes.

1. Which of the following is not part of a nucleic acid? nitrogen-containing base phosphate group
five-carbon sugar (deoxyribose or ribose) amino acid Which of the following can catalyze
reactions and perform other activities in a cell? Nucleic Acid Protein Lipid Carbohydrate Which
listed characteristic do most lipids have in common? absence of phosphorous most chemical
bonds are polar soluble in water insoluble in water Carbon, pictured here, is considered versatile
when it comes to bonding with other atoms and making important compounds. Which feature of
carbon most contributes to this versatility? Carbon has 2 electrons in the first electron shell.
Carbon is very stable Carbon can share its four outermost electrons with other atoms. Carbon has
two vacancies in its outer shell. Carbon has extra electrons and therefore has a negative charge.
their outermost shell is filled to capacity they have equal numbers of protons and neutrons they
have a positive charge. they have a negative charge. Which of the interactions below constitute
an ecosystem? Community and biotic factors Community and environment Population and
weather Population and community A cell has a nucleus. To what group does this cell belong?
Virus Bacteria E. coli Eukaryote Prokaryotes: evolved after eukaryotes lack a nucleus lack a
plasma membrane are multicellular Which of the following organization levels is NOT studied
by ecologists? populations ecosystems communities individuals genomes The mitochondria in
eukaryotes may have evolved from : parasitic viruses a fusion of chloroplasts symbiotic bacteria
a fusion of ribosomes The mitochondria in eukaryotes may have evolved from : parasitic viruses
a fusion of chloroplasts symbiotic bacteria a fusion of ribosomes