Correct Answer: B. fraternal twins are produced

Correct Answer: A. estuarine → rain forest → Guinea Savannah → Sahel Savannah

Correct Answer: A. Carbondioxide

Correct Answer: D. rainfall pattern

Correct Answer: A. margarine and butter

Correct Answer: B) activates the enzymes

Explanation

During the germination process, water is essential for several reasons. Firstly, it helps to activate the enzymes present in the seed that are responsible for breaking down the food reserves stored in the seed. This process is necessary for the embryo to grow and develop into a seedling. Without water, the enzymes would remain inactive, and the seed would not be able to germinate. Secondly, water is needed to facilitate the movement of nutrients from the soil into the seed. The seedling requires these nutrients to grow and develop into a healthy plant. Water also helps to maintain turgor pressure, which is necessary for plant growth. Moreover, water helps to regulate the temperature around the seed, which is crucial for its survival. It also protects the seed from desiccation by keeping the moisture level high around the seed. In conclusion, water plays a vital role in the germination process by activating enzymes, facilitating the movement of nutrients into the seed, maintaining turgor pressure, regulating temperature, and protecting the seed from drying out. Therefore, Option B, which states that water activates the enzymes, is the correct answer.

Correct Answer: D) parthenocarpic

Explanation

This Biology question is asking about a type of fruit that develops without fertilization. In other words, a fruit that can grow without the involvement of male and female reproductive cells. The options are: simple, aggregate, multiple, and parthenocarpic. The correct answer is option D, parthenocarpic. Parthenocarpy is a process where fruits are produced without fertilization. This can occur naturally or artificially. In natural parthenocarpy, the fruit develops without pollination, while in artificial parthenocarpy, the fruit is induced to grow without fertilization by using hormones or other methods. Parthenocarpic fruits are usually seedless, and some examples include bananas, grapes, and oranges. They are often preferred by farmers and consumers because they are easier to grow and have a longer shelf life. It is important to note that not all fruits can be parthenocarpic, and the process may not always result in a viable fruit. However, parthenocarpy is an interesting field of research in plant biology and has many practical applications in agriculture. In summary, a fruit that develops without fertilization is called a parthenocarpic fruit. This is a natural or artificially induced process that can result in seedless fruits.

Correct Answer: A. skull, ribs, vertebral column and breast bone

Correct Answer: A. Poisonous substances in the body are converted into harmless substances

Correct Answer: B. secchi disc