Correct Answer: C. cilia

Correct Answer: D) turbidity

Explanation

A secchi disc is a tool used in biology to measure the clarity of water. The disc is lowered into the water until it can no longer be seen, and the depth at which it disappears is recorded. This measurement is used to determine the turbidity of the water. Turbidity refers to the cloudiness or haziness of a fluid, which is caused by the presence of suspended particles such as sediment, algae, or other microorganisms. The question is asking which of the options is determined using a secchi disc. From the options provided, the correct answer is turbidity. Rainfall refers to the amount of precipitation that falls from the atmosphere to the ground, tides are the periodic rise and fall of sea levels caused by the gravitational forces of the moon and sun, waves refer to the disturbance that travels through a medium, such as water, and current velocity refers to the speed at which water is flowing in a particular direction. Therefore, in summary, a secchi disc is used to determine the turbidity of water.

Correct Answer: D) Left ventricle

Explanation

The question is asking about the primary structure responsible for pumping blood for circulation through the mammalian circulatory systems. The options provided are veins, right auricle, arteries, and left ventricle. Veins are blood vessels that carry deoxygenated blood from the body back to the heart. While veins do play a crucial role in the circulatory system, they are not the primary structure responsible for pumping blood. The right auricle is one of the four chambers of the heart, and its main function is to receive deoxygenated blood from the body and pump it into the right ventricle. However, it is not the primary structure responsible for pumping blood for circulation. Arteries are blood vessels that carry oxygenated blood away from the heart to the rest of the body. While they play an important role in the circulatory system, arteries are not responsible for pumping blood. The correct answer is option D, the left ventricle. The left ventricle is the largest and strongest chamber of the heart and is primarily responsible for pumping oxygenated blood into the aorta, which then distributes the blood to the rest of the body. Understanding the different parts of the circulatory system is important in biology. The circulatory system is responsible for transporting blood, oxygen, nutrients, and waste products throughout the body. It is made up of the heart, blood vessels, and blood. The heart is the muscular organ that pumps blood throughout the circulatory system. The blood vessels include arteries, veins, and capillaries, which are responsible for transporting blood to and from the heart. The blood carries oxygen, nutrients, and waste products throughout the body. To learn more about the circulatory system and its different components, please see the relevant sections of your biology textbooks.

Correct Answer: A. Urea

Correct Answer: C. chlorophyllous parts

Explanation

a(i) Diagram of the mammalian heart

(a)(ii) Pulmonary circulation in mammals takes the following process:The heart muscles contract, allowing de-oxygenated blood from the right ventricle to pass through the pulmonary valve into the pulmonary artery to the lung capillaries for exchange of oxygen and carbon dioxide. Oxygenated blood from the lungs then return by the pulmonary vein to the left auricle.

(b) The processes by which mammalian body reduces its temperature are:

(i) relaxation of hair erector muscles

(ii) increased sweat production

(iii) vasodilation

(iv) reduction in heat generated by muscles

(v) reduction of metabolic activities by the body

(vi) conversion of energy into ATP instead of heat

(vii) panting/yawning also reduces temperatures.

Correct Answer: B. Finger prints

Correct Answer: C. Jean Lamarck

Correct Answer: C. anabolism must exceed that of catabolism

Correct Answer: D. a herbivore