In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

A. ffx ff

B. Ffx Ff-

C. Ff x ff

D. FFX FF

Answer Explanation:

To produce only offspring with smooth leaves, the parents must both have two copies of the recessive allele (f) for this trait.

Therefore, the Correct Answer is A.

Q #1: Which of the following substances is responsible for donating H+ ions to act as a buffer when blood pH rises?

A. Carbon dioxide

B. Carbonic acid

C. Oxygen

D. Carbon monoxide

Answer Explanation

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. In the human body, blood is an important buffer that helps maintain a stable pH of about 7.4. One of the main components of the blood buffer system is the bicarbonate buffer, which involves the equilibrium between carbon dioxide (CO2), carbonic acid (H2CO3), and bicarbonate ions (HCO3-). When blood pH rises, meaning it becomes more basic, the bicarbonate buffer can donate H+ ions to lower the pH and restore the balance. The substance that donates H+ ions in this case is carbonic acid, which dissociates into H+ and HCO3-. Therefore,
Q #2: Which of the following endocrine organs in the diagram below is involved in regulating milk production following childbirth?

A. Ovaries

B. Adrenal glands

C. Thyroid gland

D. Pituitary gland

Answer Explanation

Lactation is stimulated by a hormone called prolactin, which is produced by the pituitary gland. The pituitary gland is a small, pea-sized organ located at the base of the brain.
Q #3: Which of the following properties of water explains its solvent abilities for certain substances?

A. Polarity of water molecules

B. High specific heat

C. High surface tension

D. Kinetic energy of liquid water molecules

Answer Explanation

Water is a versatile solvent because it can dissolve many different kinds of substances. The reason for this is the polarity of water molecules, which means that they have a slight positive charge on one end and a slight negative charge on the other. This allows water molecules to attract and surround ions or polar molecules of other substances, forming hydration shells that separate them from each other.

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In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

More Questions on TEAS 7 Science

Q #1: Which of the following substances is responsible for donating H+ ions to act as a buffer when blood pH rises?

Answer Explanation

Q #2: Which of the following endocrine organs in the diagram below is involved in regulating milk production following childbirth?

Answer Explanation

Q #3: Which of the following properties of water explains its solvent abilities for certain substances?

Answer Explanation

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