Select four variables that affect farm incomes. trade barriers
hectares
policies and regulations
natural resources
rural development
nutrition
global supply and demand
of the weather

the cell theory states that all living things including animals, as well as plants, are made of cells.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

answer( increase) their individual contractile activity;