Q: What causes maple leaves to change their colors? Read this paragraph and choose the correct option from the provided answers: These vividly colored maple leaves were all bright green during the summer. Every fall, leaves of maple trees change to brilliant red, orange, and yellow colors. A change of color is a sign that a chemical change has taken place. Maple leaves change color because of chemical reactions. Choices: - artificial preservatives - factor reactions - radiation reactions - chemical reactions A:
chemical reactions

(Question)
Q: Each microspore develops into a pollen grain containing a male what? Read this paragraph and choose the correct option from the provided answers: Choices: - progesterone - zygote - sperm - gametophyte A:
(Answer)
gametophyte

Ques: Q: How many different kinds of ions are produced when sodium chloride dissociates ? Read this paragraph and choose the correct option from the provided answers: The sodium chloride dissociates into two ions, while the glucose does not dissociate. Therefore, equal concentrations of each solution will result in twice as many dissolved particles in the case of the sodium chloride. The vapor pressure of the sodium chloride solution will be lowered twice the amount as the glucose solution. Choices: - five - one - three - two A:
Ans: two

(Q).
Q: The speed of a particle in what state is directly proportional to the temperature of the system? Read this paragraph and choose the correct option from the provided answers: The speed of a gas particle is directly proportional to the temperature of the system. Choices: - frozen - solid - liquid - gas A:
(A).
gas

Ques:Q: What is made up of the pinna, ear canal, and eardrum? Read this paragraph and choose the correct option from the provided answers: The outer ear includes the pinna, ear canal, and eardrum. These structures gather sound waves, funnel them into the ear, and pass the vibrations to the middle ear. Choices: - the epidermis - the inner ear - the nervous system - the outer ear A:

Ans:the outer ear

Ques:Q: What is it called when pollen from one plant fertilizes another plant of the same species? Read this paragraph and choose the correct option from the provided answers: Pea plants are naturally self-pollinating. In self-pollination , pollen grains from anthers on one plant are transferred to stigmas of flowers on the same plant. Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some of the plants in his experiments. Then he pollinated them by hand with pollen from other parent plants of his choice. When pollen from one plant fertilizes another plant of the same species, it is called cross-pollination . The offspring that result from such a cross are called hybrids. Choices: - cross-typing - cross-breeding - cross - vegetation - cross-pollination A:

Ans:
cross-pollination