Mutations can cause instant adaptations<span>, while </span>natural selection<span> is the process by which </span>adaptations<span> occurs over a series of generations. </span>Adaptations<span> are changes or processes of changes by which an organism or species becomes better suited for its environment. A mutation is an alteration of the DNA sequence.</span>
Whereas in eukaryotic cells there are
<span>chloroplast (plastid) </span>
<span>Golgi apparatus </span>
<span>endoplasmic reticulum </span>
<span>vacuole </span>
<span>nucleus </span>
<span>Mitochondria </span>
<span>chloroplasts, </span>
<span>centriole </span>
<span>glycosome </span>
<span>glyoxysome </span>
<span>hydrogenosome </span>
<span>lysosome </span>
<span>melanosome </span>
<span>mitosome </span>
<span>myofibril </span>
<span>nucleolus </span>
<span>parenthesome </span>
<span>peroxisome </span>
<span>ribosome </span>
<span>vesicle </span>
During DNA replication, the two strands separate as the hydrogen bonds connecting the parent strands are broken by an enzyme called helicase. In the DNA molecule (double strand) complementary bases are joined by hydrogen bonds; that is; Adenine paired to thyamine and guanine to cytosine; during replication the enzyme helicase separates the double helix by breaking the hydrogen bonds between the complementary bases.
B. Because, Bacteria is a prokaryote on its own.
Answer:
Selective transport enables the substances to move rapidly through the cell membrane (for instance, H2O, O2 and CO2), while other substances pass through the cell membrane more slowly. Moreover, there are also compounds that can't pass through this barrier.
Explanation:
The selective transport of the substances across the cell membrane enables the cell to maintain the homeostasis of the system by maintaining the ionic equilibrium on both sides of the cell membrane. Moreover, selective transport also is required for carrying out cellular mechanisms, since this mechanism enables the entry and the exit of macromolecules used by the cell to maintain its function and structure.
The most common mechanisms of selective transport are diffusion and transport active. Endocytosis and exocytosis are active transport process where proteins, lipids, and different types of macromolecules are transported to both sides of the cell membrane through vesicles. Polar molecules (such as for instance, calcium and iron ions) may be transported via transport active, while hormones and vitamins may be transported via passive diffusion.
