The declining levels of testosterone leads to aging. Testosterone is the male hormone that is responsible for a man's fertility, muscle mass, fat distribution throughout the body. It is also helps in improving secondary sexual characteristics and maturing the male's reproductive organs.
Answer: B) Indoor air pollution would increase with closed windows during the colder months.
Explanation: Sorry no in depth explanation this time. Hope this helps :))
Answer:
Without the primary consumers there would be no source of energy for carnivores or secondary consumers so no secondary consumers would exist in that ecosystem. Also there would by definition be no primary consumers. The producers would be the only organisms in the ecosystem, besides decomposers.
The type of venation which does the plant exhibit that the leaf shows veins arising from a central thick vein to form a complicated network is the (C.) Reticulated venation.
In reticulated venation, the veins here are arranged in a net-like pattern and are all interconnected. It is also the most common type of venation.