What kind of air masses form over land?

a) maritime air mass

b) polar air mass

c) continetal air mass

d) tropical air mass

What does a cell's surface area to volume ratio affect? A. The cell's ability to reproduce B. The cell's ability to defend itself C. The cell's ability to feed enough D. The cell's ability to replicate it's DNA

Platyhelminthes, like the flatworm seen here, do not have a respiratory system. All but one of the statements explains why this is possible. That is they A) are anaerobic organisms. B) live in a moist/aquatic environment.

Which term refers to the tearing of ligaments surrounding a joint? a. cramp b. spasm c. sprain d. strain

Which of the following is accurate about organisms in an ecosystem? Question 1 options: Producers make their own food and consumers cannot make their own food. Consumers always eat other animals while producers eat plants and animals.

Explain how a testcross can be used to determine if a dominant phenotype is heterozygous or homozygous.

Which data type, morphological or molecular, will allow you to create a more accurate cladogram?

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.