The answer is Body parts created <span>during the first trimester, and they complete their development during the third.</span>
They produce narrow-band high-frequency sound to help them navigate in water. These high-frequency sounds are used in echolocation. Echolocation is used to identify and locate prey and also avoid the predators. Marine mammals like whales and dolphin use echolocation in different manners.
The substances that protect against oxidative stress and the resultant tissue damage at the cellular level is, option B. Antioxidants. Oxidation can cause imbalance in the body. Antioxidants are used to counteract the damage produced by free radicals. Good natural sources of antioxidants include fruits and vegetables.
Chloroplasts help them detect light. Chloroplasts are also contained in plants.
Examples:
Respiratory System, (I think) Organ System, Circulatory System, Nervous System, etc.
