Answer: D) Motor neuron
Explanation: The sympathetic nervous system prepares the body for situations that require alertness or strength, such as situations that arouse fear, anger, emotion, or shame ("fight or flight" situations). In this type of situation, the sympathetic nervous system stimulates the heart muscles to increase the heart rate, dilates the bronchial tubes of the lungs (increases oxygen retention) and causes the dilation of blood vessels that supply the heart and skeletal muscles (increasing the blood supply).
Answer:
To make energy available for transfer to higher trophic levels.
Explanation:
- <em>Primary consumers </em>are the organisms that feed directly on the autotrophs to obtain energy.
- These consumers thus help to transfer energy to higher trophic levels that are <em>secondary consumers.</em>
- An example is the goat feeding on a plant is a primary consumer that directly obtains its energy from the plant. However, by feeding on the plant, it makes energy available for the secondary consumer, which in this case would be a lion.
Studying animals in the wild is considered somewhat experimentally out of control because of several reasons.
<u>Explanation:</u>
Study of wild animals can be done using several methods but none will be as effective as studying captivated animals. Using stationary cameras is a method to observe animals in the wild. The stationary nature of the camera makes it necessary for the animals to appear within the field of the camera.
This is difficult in places of low animal density. In addition to that placing camera at a longer distance to watch a larger area decreases the resolution of the images. When it comes to shallow water systems, the field imagery used to track the aquatic species frequently gets affected by issues like sun flicker.
Unmanned aerial vehicles can also be used to track and study animals in the wild. This is good alternative but filming through dense canopies or turbid water is a limitation. Bio loggers can also be used for animal tracking but it is limited by weight since it has to be carried by animals.
Answer:protonema
Explanation:
Mosses have protonema that develops from germinating spores,which is a multicellular filament. This filament has high chlorophyll content and hence can photosynthesis generating food for its growth.
A protonema may produce leafy shoot and this is done under a favourable condition, this shoot later develop into bud.
In the same system, the organisms are interdependent: one is a food source for another, which in turn is a food source for another, etc. this does not end with predators: when they die, their bodies are a food source for very small animals.