Blood cells are made in which system?

a. skeletal system

b. circulatory system

c. muscular system

d. nervous system

In insects, what is the adaptive significance of spiracles? in insects, what is the adaptive significance of spiracles? they dilate and constrict during flight or other types of movement, functioning as a "breathing" mechanism.

Why is ice important to life?

Among pea plants, we see more peas with smooth pods than with constricted pods. if a plant with constricted pods is mated with a plant with smooth pods, the offspring have smooth pods.

What is involved in the cycling of carbon within the environment

Which statement represent an abiotic environmental factor in an ecosystem? *The flower bud every spring. *The fish swim up the river to reproduce. *The fox eats meats in the meadow. The lake bottom is lined with rocks,

What process of desalination uses high pressure and selectively permeable membranes to remove salt from seawater?

Why does the carbon dioxide concentration in an occupied classroom change during a class period?

What is terrae on the moon

The largest continent is OA) Africa OB) Eurasia OC) North America OD) South America

What problem would most likely to occur if a haploid cell attempted to perform meiosis? the cell could not replicate its dna prior to meiosis. the cell could not pair homologous chromosomes during meiosis i.