Ques: Q: What helps represent age-sex structure of the population? Read this paragraph and choose the correct option from the provided answers: The age-sex structure of a population is the number of individuals of each sex and age in the population. Age-sex structure influences population growth. It is represented by a population pyramid. The number of survivors at each age is plotted on a survivorship curve. Choices: - habitat chart - density graph - biome model - population pyramid A:
Ans: population pyramid

Ques: Q: When calculating impulse, consider the change in _______ of one of the objects in the collision? Read this paragraph and choose the correct option from the provided answers: the initial momentum of an object. When calculating impulse, consider the change in momentum of one of the objects in the collision. Choices: - sound - potential energy - velocity - momentum A:
Ans: momentum

Ques: Q: In humans, what is the first organ to form and become functional? Read this paragraph and choose the correct option from the provided answers: 19.5 Development of the Heart The heart is the first organ to form and become functional, emphasizing the importance of transport of material to and from the developing infant. It originates about day 18 or 19 from the mesoderm and begins beating and pumping blood about day 21 or 22. It forms from the cardiogenic region near the head and is visible as a prominent heart bulge on the surface of the embryo. Originally, it consists of a pair of strands called cardiogenic cords that quickly form a hollow lumen and are referred to as endocardial tubes. These then fuse into a single heart tube and differentiate into the truncus arteriosus, bulbus cordis, primitive ventricle, primitive atrium, and sinus venosus, starting about day 22. The primitive heart begins to form an S shape within the pericardium between days 23 and 28. The internal septa begin to form about day 28, separating the heart into the atria and ventricles, although the foramen ovale persists until shortly after birth. Between weeks five and eight, the atrioventricular valves form. The semilunar valves form between weeks five and nine. Choices: - brain - liver - pancreas - heart A:
Ans: heart

Ques: Q: Changes in the color of the statue of liberty owe to oxidation-reduction reactions, or what simpler term? Read this paragraph and choose the correct option from the provided answers: Chemistry in Everyday Life Statue of Liberty: Changing Colors The Statue of Liberty is a landmark every American recognizes. The Statue of Liberty is easily identified by its height, stance, and unique blue-green color (Figure 17.16). When this statue was first delivered from France, its appearance was not green. It was brown, the color of its copper "skin. " So how did the Statue of Liberty change colors? The change in appearance was a direct result of corrosion. The copper that is the primary component of the statue slowly underwent oxidation from the air. The oxidation-reduction reactions of copper metal in the environment occur in several steps. Copper metal is oxidized to copper(I) oxide (Cu2O), which is red, and then to copper(II) oxide, which is black. Choices: - copper - oxygen - immersion - corrosion A:
Ans:
corrosion