Correct Answer: C. lateral line

Correct Answer: D) Controls thinking in mammals

Explanation

The question is asking which of the following options is true about the parasympathetic nervous system. The parasympathetic nervous system is part of the autonomic nervous system, which controls involuntary actions in the body. The options given are A) dilation of the pupil of the eye, B) control the activities of smooth muscles, C) dilatation of the skin, D) controls thinking in mammals, and E) increased metabolism. Option A is incorrect because the sympathetic nervous system is responsible for dilation of the pupil of the eye. Option B is correct because the parasympathetic nervous system controls the activities of smooth muscles, which include the muscles of the digestive system, the urinary system, and the respiratory system. Option C is incorrect because the sympathetic nervous system is responsible for dilatation of the skin. Option D is incorrect because the parasympathetic nervous system is not responsible for controlling thinking in mammals. Option E is incorrect because the parasympathetic nervous system is not responsible for increased metabolism. It is important to note that the sympathetic and parasympathetic nervous systems work together to maintain homeostasis in the body. The sympathetic nervous system is responsible for the fight or flight response, while the parasympathetic nervous system is responsible for the rest and digest response. Both systems are essential for the proper functioning of the body. In conclusion, the correct answer to the question is option B, which states that the parasympathetic nervous system is involved in controlling the activities of smooth muscles.

Correct Answer: D) Schizocarp

Explanation

The question is asking about a type of fruit that is dry and can break into several parts, with each part containing one seed. The options are caryopsis, aggregate fruit, legume, follicle, and schizocarp. The correct answer is schizocarp. Schizocarp is a type of dry fruit that splits into several parts, each containing a single seed. This is different from an aggregate fruit, which is a fruit that forms from several ovaries in a single flower. A legume, on the other hand, is a type of fruit that splits along two sides and contains multiple seeds. A follicle is a type of dry fruit that splits along one side to release its seeds. A caryopsis is a type of fruit where the seed is fused to the fruit wall, as seen in grains like rice and wheat. Understanding the different types of fruits is important in botany and agriculture. By knowing the characteristics of different fruits, we can better understand how they grow, reproduce, and how to cultivate them.

Correct Answer: B. workers

Correct Answer: B. Rainfall

Correct Answer: B. holozoic

Correct Answer: D. Absorption of digested food into the villi

Correct Answer: C. carries blood away from the heart

Correct Answer: C. The sample contains 22% uracil.

Explanation

In RNA, the nucleic acid base adenine pairs with uracil. (In DNA, it pairs with thymine). In both RNA and DNA, cytosine pairs with guanine. Accordingly, RNA will have the same percent uracil as it does adenine

Correct Answer: D) Fungi

Explanation

Nutrient cycling is the process where nutrients are passed through different organisms and the environment. The question is asking which group of organisms is critical in this process. The options are Aves (birds), Nematoda (roundworms), Mammalia (mammals), and Fungi. Out of the options, the correct answer is Fungi. Fungi are important in nutrient cycling because they are decomposers. They break down dead organic matter, such as leaves and wood, into simpler compounds that can be reused by other organisms. Fungi also form mutualistic relationships with plants, where they help the plants absorb nutrients from the soil in exchange for carbohydrates produced by the plants through photosynthesis. Aves, Nematoda, and Mammalia are not as critical in nutrient cycling as Fungi. While some birds and mammals may play a role in dispersing seeds and helping with pollination, they do not have as significant of a role in breaking down organic matter as fungi do. In summary, Fungi are critical in the process of nutrient cycling due to their ability to break down dead organic matter and form mutualistic relationships with plants.