Answer:
The correct answer is given below:
Explanation:
Depending upon the availability of oxygen, pyruvic acid follows, a variety of metabolic pathways.
In the absence of oxygen or under anaerobic conditions, the pyruvic acid further metabolised into one of three pathways: lactic acid fermentation, alcohol fermentation and cellular anaerobic respiration. During fermentation or anaerobic respiration 2 ATP is produced.
In the presence of oxygen or under aerobic conditions, the pyruvic acid completely oxidised to carbon dioxide, water and 38 ATP.
Answer: By Hormonal action and Nervous coordination
Explanation:
Hormones are substances produced by one tissue and conveyed by the bloodstream to another to effect physiological activity. Homeostasis is the maintenance of a stable internal environment in the body.
Body systems such as digestive, circulatory, excretory systems etc, all are coordinated to achieve a STABLE INTERNAL ENVIRONMENT by the aid of HORMONES AND/OR NERVOUS COORDINATION.
For Example: the vasodilation of blood vessels during hot weather, and the opposite action of vasoconstriction during cold weather are both controlled by Hormonal action and nervous coordination which leads to a stable body temperature preventing excess heat accumulation.
Also, Nervous system controls the body systems, such that the muscle contractions are joined to actions like sweating, breathing, respiration etc
So, to maintain homeostasis hormonal action and Nervous coordination is necessary.
The answer to the question B which is the principle of dominance. Say the genotype of plant 1 is TT(tall, homozygous) and plant 2 is tt(short, homozygous). <span>T is dominant over t.
Crossing the two plants, we end with genotypes that all show Tt.
Since T is dominant it will show between the two, resulting in all tall plants.</span>
Answer: the graph supports: background extinctions, mass extinctions affected the evolution of mammals and dinosaurs
The graph does not support:both mammas and dinosaur revolved in the pattern of gradualism, dinosaurs evolved by adaptive radiation, and convolution affected the evolution of mammals and dinosaurs
Explanation:The graph only shows mass extinctions and background extinctions
