Which of the following molecules are found in substantial quantities in both the cell membrane and in DNA?

The hip bone (or pelvis) in adults is formed by the fusion of three separate bones: the ilium, ischium, and pubis. This fusion occurs during adolescence and results in a single, solid structure.

Independent assortment occurs during metaphase I when homologous chromosome pairs line up randomly at the cell’s equator. This randomness contributes to genetic variation because the distribution of maternal and paternal chromosomes into gametes is different each time meiosis occurs.

The correct answer is B. The phenotypic ratio of 50% green pods and 50% yellow pods indicates that the genotype of the parent with green pods is heterozygous (Gg), and the genotype of the parent with yellow pods is homozygous recessive (gg). The cross would be Gg x gg.

The correct answer is B. Gray matter in the brain primarily consists of neuron cell bodies, dendrites, and unmyelinated axons. It is involved in information processing and integration.

The correct answer is C. Helper T-cells play a crucial role in the immune system by coordinating and stimulating other immune cells, including cytotoxic T-cells, to attack and destroy foreign agents.

The correct answer is D. The scientific purpose would be to analyze the factors that led to the failure of the 1924 expedition, providing insights into mountaineering challenges and safety considerations, rather than demonstrating modern technology or exploring new routes.

The correct answer is C. The digestive system is responsible for breaking down complex food molecules, including proteins, into simpler components such as amino acids that can be absorbed and utilized by the body.

The correct answer is B. This option involves a control group (water) and an experimental group (energy drink) to compare the effects. By having a group that does not consume the energy drink, researchers can better attribute any observed differences in running speed to the energy drink itself.

The pharynx is primarily composed of muscle tissue. It plays a role in swallowing and is part of both the respiratory and digestive systems, which requires coordinated muscular activity.

The correct answer is C. Lysosomes are membrane-bound organelles containing enzymes that break down cellular waste, debris, and foreign materials through intracellular digestion.