Plant cells have thick, sturdy cell walls, which provide rigidity and hold up the plant.
Macromolecules like carbs, protein and lipids (fats) are made of smaller molecules like simple sugars (carbs), amino acids (protein), or fatty acids (lipids). These molecules must be broken down to be used.
Let me know if you need further elaboration, I took human nutrition last semester. :)
The continuation of life depends on both <u>sexual </u>and <u>asexual reproduction</u>.
Reproduction is a process where an organism gives rise to another organism, often called as "offspring". Its a process of increasing the population of any species on Earth. There are two types of reproduction process-
1. Asexual- where exact copies of parent organism are formed, also only single parent is involved.
2. Sexual- Two parents of opposite sexes are involved, offsprings are not identical to parents. There is scope of variation in sexual reproduction.
C. <span>Energy flows through an ecosystem and cannot be recycled. </span>
