How do fraternal twins form?

What kind of understandings does science contribute about the natural world?

What is the relationship between mass and acceleration

Solar energy is used to produce engery-rich compounds in structure

After mixing a heat-killed, phosphorescent strain of bacteria with a living non-phosphorescent strain, you discover that some of the living cells are now phosphorescent.

Depending upon the disease, individuals can be contagious during the incubation period, period of illness, and the period of convalescence. a. True b. False

Which characteristic of a protein may change during a dna mutation

Which system consists of the body's outer covering?

Answer of layla, age 4, breaks out in hives whenever she has eaten too many strawberries or oranges. she will occasionally accept a small serving of applesauce or a few bites of banana but few other fruits.

Which list correctly describes the three domain systems for classifying organisms A. bacteria, archaea, eukarya B. Darwin, Linnaeus, lamarck C. animalia, planter, fungi D. None of the above

Elephant seals are abundant in their population size but they have low genetic diversity within their species due to overhunting by humans in 1890s. Why might the survival of this species be threatened in the future?