A part of the periodic table is shown. A portion of the first two columns of the periodic table is shown. Column one from top to bottom reads three lithium, 11 sodium, and 19 potassium. Column two reads four beryllium, 12 magnesium, and 20 calcium. Which of the following elements is less reactive than the others? Beryllium (Be) Calcium (Ca) Lithium (Li) Magnesium (Mg)

Genetic diversity is the variation in the genes of an entire species. each circle represents a population of a particular species in different habitats. select the population with maximum genetic diversity

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.