Although amphibious frogs live on land and in water, they must lay their eggs in water or the eggs will dry up, effectively killing the offspring inside. Frog eggs are covered with a glycoprotein, which helps keep the eggs moist. This glycoprotein has to keep in contact with a source of moisture, such as water.
The best answer here would be A.
The pituitary gland is connected to the hypothalamus. The pituitary is a pea sized organ that controls hormones. What the hypothalamus does is control body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity. The hypothalamus needs the pituitary to be active because the pituitary makes the decision of what people are feeling in their body, and the hypothalamus releases those feelings into the body.
The correct answer is: d) intercalated discs
Cardiac muscle tissue is muscle tissue found in the heart. It is similar to skeletal muscle in that both are striated and organized into sarcomeres but cardiac muscle fibers are shorter and usually contain only one nucleus in the central region of the myocyte (muscle cell). Cardiac muscle fibers are rich in mitochondria and myoglobin, (ATP is produced primarily through aerobic metabolism), are extensively branched and are connected to one another by intercalated discs. An intercalated disc is a structure that enables the propagation of contraction among muscle cells: it allows the muscle cells to contract in a wave-like pattern.
Answer: DNA or DeoxyriboNucleic Acid hope this is what you were looking for.
