Correct Answer: A. ovaries

Correct Answer: D. contentedly

Correct Answer: A. Disk

Correct Answer: C. Sodium

Explanation

In the electrochemical series, also known as the reactivity series, Sodium is placed at the top. The electrochemical series is a list of elements in the order of their standard electrode potentials (or redox potentials). Elements at the top of the series are more reactive and have a greater tendency to lose electrons and form positive ions.

Correct Answer: A. 16

Explanation

(a) Ovulation : This is the rupturing of the ovary wall to release mature eggs (ova) or ovum into the oviduct of the female animal. It is under the control of the pituitary gland and it occurs in between oestrus cycle.

(b) Oestrus cycle : This is the interval from the end of one heat period to the beginning of another. It is the period of heat in farm animals and it is controlled by a hormone. It varies from one animal to another, e.g. Cow = 20 - 21 days; Ewe = 7 -21 days; Sow --- 14 - 28 days .

(c) Gestation:This is the time between conception and birth, during which the embryo orfetus is developing in the uterus

(d) Parturition : This is the act of giving birth in farm animals. It marks the end of pregnancy and the beginning of lactation. The act of giving birth in Cow - Calving, Sow - Farrowing, Ewe - Lambing, Doe (Goat) Kidding.

Correct Answer: D. paradox

Correct Answer: D. 144/169

Explanation

\(\sin x = \frac{12}{13}\)

\(\cos x = \frac{5}{13}\)

\(\cos^{2} x = (\frac{5}{13})^2 = \frac{25}{169}\)

\(1 - \cos^{2} x = 1 - \frac{25}{169}\)

= \(\frac{144}{169}\)

Correct Answer: C. Jerusalem

Correct Answer: C) Ecosystem

Explanation

An ecosystem is a group of populations of different species that interact with one another through trophic (feeding) and spatial relationships. In simpler terms, it is a community of living organisms (plants, animals, and microbes) in a particular habitat, along with the nonliving components of that environment (such as air, water, and soil). Option A, City, is not the correct answer because it refers to a human settlement and does not involve interactions between different species. Option B, Community, is close but not quite right. While it refers to a group of populations of different species, it does not necessarily involve interactions through trophic and spatial relationships. Option C, Ecosystem, is the correct answer. It encompasses all the living organisms in a particular environment, as well as the nonliving components that shape that environment. Ecosystems can range from small, localized areas (such as a pond or a meadow) to large, global systems (such as the ocean or the atmosphere). Option D, Niche, refers to the specific role that a species plays within an ecosystem. While niches are important for understanding how different species interact with one another, they do not encompass the entire system of interactions that make up an ecosystem. In summary, the correct answer to this question is Option C, Ecosystem, because it best describes a group of populations of different species interacting through trophic and spatial relationships.