It means to change the looks of the landscape. Or changes in the landscape.
Answer:
1 and 3 only
Explanation:
Qualitative includes no numbers
Answer:
3) Fertilization membrane.
Explanation:
When sperm cell fertilizes an egg cell, signal transdution occurs which causes fertilization membrane to be formed. Ovum thickens and hardens the vetelline membrane causing separation and prevents multiple fertilization by the spermatozoon.
The enzyme’s active site binds to the substrate. Since enzymes are proteins, this site is composed of a unique combination of amino acid residues (side chains or R groups). Each amino acid residue can be large or small; weakly acidic or basic; hydrophilic or hydrophobic; and positively-charged, negatively-charged, or neutral. The positions, sequences, structures, and properties of these residues create a very specific chemical environment within the active site. A specific chemical substrate matches this site like a jigsaw puzzle piece and makes the enzyme specific to its substrate.
Answer: Ions are defined as atoms that have lost or gained an electron and have a charge.
Explanation: Ions are charged atoms. Ions can be negative or positive. When an atom looses one or more electrons, it becomes positively charged and a positively charged atom is called a cation. When an atom gains one or more electrons it becomes negatively charged and a negatively charged atom is called an anion.
