Correct Answer: C. Flame cell

Correct Answer: A. Kingdom

Correct Answer: A. carried above the ground by the elongation hypocotyl

Correct Answer: B. thyroid gland

Correct Answer: A) guard cells

Explanation

Stomata are tiny openings on the leaves of plants that allow for gas exchange, which is important for photosynthesis. The question is asking about the mechanisms that control the opening and closing of stomata. The options given are guard cells, stoma, lenticels, and air spaces. The correct answer is option A: guard cells. Guard cells are specialized cells that surround the stomata and control their opening and closing. When the plant needs to conserve water, the guard cells close the stomata to reduce water loss through transpiration. When the plant needs to take in carbon dioxide for photosynthesis, the guard cells open the stomata to allow for gas exchange. Stoma, on the other hand, are the actual openings themselves, while lenticels are small pores on woody stems that allow for gas exchange. Air spaces are also important for gas exchange, but they are not directly involved in the opening and closing of stomata. Understanding the function of guard cells is important for understanding how plants regulate their water use and perform photosynthesis. To learn more about this, please read the relevant sections of the recommended textbooks.

Correct Answer: C) legume

Correct Answer: D. excretory system

Correct Answer: C. Excretion of CO2

Correct Answer: D. lower arm

Correct Answer: B) larynx

Explanation

The question is asking about the glottis, which is an opening in the body. The question is giving five options to choose from, and we are to select the correct answer. The options are oesophagus, larynx, nostrils, pharynx, and mouth. The glottis is a part of the body that is located in the throat and is responsible for regulating airflow to the lungs. It is a small opening between the vocal cords in the larynx. The larynx, which is also known as the voice box, is a part of the respiratory system that is involved in producing sound and protecting the airway from food and liquid. The other options listed in the question are also important parts of the respiratory system. The oesophagus is a muscular tube that connects the throat to the stomach and is responsible for moving food from the mouth to the stomach. The nostrils are the openings in the nose through which air enters the body. The pharynx is a part of the throat that sits behind the mouth and nasal cavity and is involved in swallowing and breathing. The mouth is the opening in the face through which food and liquids are taken in. From the options given, the correct answer to the question is option B, which is the larynx. This is because the glottis is an opening that is found in the larynx, and it regulates airflow to the lungs. In summary, the glottis is an opening in the body that regulates airflow to the lungs, and it is found in the larynx. The other options listed in the question are also important parts of the respiratory system, but they are not the correct answer to the question.