New traits and variations in a population occur by sexual reproduction.
<u>Explanation:</u>
Sexual reproduction is the process by which an organism reproduces by means of production and subsequent fusion of gametes. Sexual reproduction involves the production of gametes. These gametes are formed by means of meiosis.
Meiosis is a type of cell division which involves the crossing over and other processes that involves the gene mixing and subsequent variations from the parents among the offsprings. Thus newer characteristics are formed among the population, which is termed as variations. This is essential for further evolution.
Dinosaurs lived in the Mesozoic period
Smooth endoplasmic reticulum would be abundant in liver cells because it detoxifies drugs and poisons from the body.
The only form of energy a cell can use is a molecule called adenosine triphosphate (ATP). Chemical energy is stored in the bonds that hold the molecule together. ADP can be recycled into ATP when more energy becomes available. ... Cells convert glucose to ATP in a process called cellular respiration.