What scientific breakthrough was made in the 1940s and 1950s? paleontology

natural selection

DNA research

cell theory

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Explain nonnuclear inheritance. ~ ap biology

Idont understand by supporting the plant and holding the leaves up to the light. question 3 options: tap or fibrous root flower petals herbaceous or wood stems leaves with stomata