Answer: The G1 or start check point is the primary point of cell cycle that is influenced byexternal signals
Explanation:
Cell cycle check point are processes in eukaryotic cells that allows adequate cell divisions. They serve as potential points along the cell.
There are three types of cell cycle check points and they are;
1.G1 check point also know as restriction or major or start check point.
2. G2 check point.
3. Metaphase or spindle check point. The G1 or start check point is the primary point of cell cycle that is influenced by external signals.
Answer:
Because the have similar limbs.
Because they have similar functions.
Explanation:
(because they have similar limbs)
Homology (evolution) describes a structure that has similar function like limbs on dogs and bears (used for walking) and also have a similar arrangement of bones. The fins on a doplhin might be different from the wings on a bat but they reflect a common origin due to their bone composition e.g carpals and radius bones.
(because they have similar functions)
Analogy (evolution) describes a structure with for example, bird and butterfly wings that have no common ancestor but have the same purpose, in this case flying. They developed independtly as adaptions. This supports natural selection which is a driving force for evolution.
After age 30, total calorie needs of physically inactive adults fall steadily throughout adulthood due to a decrease in basal metabolism. Basal metabolism may be influenced by a number of factors such as age, basal metabolism generally decreases with age and with the decrease in lean body mass. Increasing muscle mass on the other hand through exercise has the effect of increasing basal metabolic rate.