Which of the following statements about the food chain is correct?
A. A grazing food chain starts with living plants.
B. Energy increases at each trophic level.
C. Decomposers are at the top of the food chain.
D. Producers are always animals.
Answer: Option A
Solution (By JKSSB Mock Tests)
Grazing food chain begins with producers (plants). Decomposers break down dead matter at all levels; energy decreases at higher levels; producers are plants/algae.
Explanation:
ANP is secreted by atrial muscle cells of the heart in response to stretching (high blood volume). It promotes sodium and water excretion, lowering blood pressure. Kidneys secrete renin, adrenal aldosterone, liver angiotensinogen.
Explanation:
The fallopian tube (oviduct) is the site of fertilization where sperm meets the ovum. The fertilized zygote then travels to the uterus for implantation. Ovary releases the ovum. The uterus is the site of implantation and fetal development. Cervix is the lower narrow portion of the uterus. The ampulla of the fallopian tube is the most common fertilization site.
Explanation:
The root cap is a thimble-like mass of parenchyma cells covering the apical meristem, protecting it as the root pushes through the soil. It also secretes mucilage to ease passage. Cells are constantly sloughed off and replaced. The meristematic zone is where cells divide.
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