Answer:
Double fertilization involves two sperm cells; one fertilizes the egg cell to form the zygote, while the other fuses with the two polar nuclei that form the endosperm. After fertilization, the fertilized ovule forms the seed while the tissues of the ovary become the fruit.
The right answers are B, C and D.
An enzyme is a protein with catalytic properties. Virtually all biomolecules capable of catalyzing chemical reactions in cells are enzymes; some catalytic biomolecules, however, consist of RNA and are therefore distinct enzymes: they are ribozymes.
An enzyme acts by lowering the activation energy of a chemical reaction, which increases the rate of reaction.
Answer:
Shifting seasons are directly linked to warmer global temperatures. A slight change in temperature is enough to push the spring thaw earlier, and delay the first frost until later in the fall. ... The US EPA uses leaf and bloom dates reflecting national phenology trends to indicate climate change.
The right option is; Absorption
Transport of a substance from the lumen (cavity) of an organ into one side of a cell and out the other side of the cell into the ecf is called absorption.
Absorption is the process of assimilating substances into cells or through the tissues and organs. Absorption is done through osmosis or diffusion. Absorption of substances takes place within the body such as the absorption of drugs into the bloodstream, and the absorption of nutrients by the digestive system.
