During egg cell reproduction in a human female, the 21st pair of chromosomes may fail to separate. this failure to separate is known as

Explain what would happen if plankton were removed from the marine food webs.

Shari and her family change their use of transportation. They use their private automobile less often, and instead rely more on public transportation, bicycles, and walking. How does their change in behavior affect their ecological footprint? A.

Describe how molecular biologists identify genes in sequences of dna

Water has special characteristics because of the nature of hydrogen bonds. what are they?

Which of the following is an abiotic factor of a desert? a. cactus b. sand c. lizards d. wildflowers

Define immunity, and distinguish between active and passive immunity?

Autopsy on a stillborn fetus reveals cardiomegaly, hepatomegaly, edema, and ascites as well as fulminant intrauterine congestive heart failure. Considering these findings, what is the most likely cause of death? a. Alpha thalassemia minor b.

Which of these structures are found in both plant and animal cells? cell wall, mitochondria, ribosomes mitochondria, ribosomes, vacuoles vacuoles, chloroplasts, cytoplasm cytoplasm, cell wall, vacuoles

Each dna strand in a double helix contains all the information needed to make a new identical double helix.

What do biologists use to establish whether or not two organisms are the same species