Correct Answer: C. courtship

Correct Answer: D) Pulp cavity

Explanation

The question is asking about a specific part of a tooth. The options are Root, Enamel, Dentine, and Pulp cavity. To answer the question, we need to understand the structure of a tooth. A tooth has three main parts: the crown, neck, and root. The crown is the visible part of the tooth that is covered by enamel, which is a hard, protective layer. The neck is the part of the tooth that connects the crown to the root. The root is the part of the tooth that is embedded in the jawbone and is not visible. The part of the tooth that contains blood vessels and nerve fibres is called the pulp cavity. The pulp cavity is located in the centre of the tooth and extends from the crown to the tip of the root. The pulp cavity contains blood vessels and nerve fibres that supply nutrients and sensation to the tooth. Therefore, the correct option in this question is option D, Pulp cavity. It is important to understand the different parts of a tooth and their functions in order to maintain good oral hygiene and prevent dental problems.

Correct Answer: D. Grasshopper

Correct Answer: C. Transportation

Correct Answer: B. leaves turning yellow

Explanation

Manganese deficiency can be easy to spot in plants because, much like Magnesium deficiency (agriculture), the leaves start to turn yellow and undergo interveinal chlorosis. The difference between these two is that the younger leaves near the top of the plant show symptoms first because manganese is not mobile while in magnesium deficiency show symptoms in older leaves near the bottom of the plant.

Correct Answer: C. Formation of complex caste systems

Correct Answer: A. possess valves at internals throughout their length

Correct Answer: A) amphibian

Explanation

This Biology question is asking which type of vertebrate undergoes external fertilization. External fertilization is when fertilization (the fusion of an egg and sperm cell) occurs outside of the body. The options are amphibians, reptiles, birds, mammals, or both birds and mammals. The correct answer is Option A, amphibians. Amphibians are a type of vertebrate that typically lay their eggs in water or moist environments. The male releases sperm onto the eggs, and fertilization occurs externally. Reptiles, birds, and mammals all have internal fertilization, which means that fertilization occurs inside the female's body. Reptiles and birds lay shelled eggs that are fertilized internally, while mammals give birth to live young that have already been fertilized internally. It's important to note that there may be some exceptions to these generalizations, but in most cases, amphibians are the only vertebrates that undergo external fertilization. In summary, the correct answer to this Biology question is Option A, amphibians, as they are the only type of vertebrate that undergoes external fertilization.

Correct Answer: C. diabetes

Explanation

(a)i. Instrument for collecting soil organisms from a soil sample

• Sieve
• Tullgren funnel

ii. Instrument for collecting tiny insects from a leaf or stem

• Pooter

(b) Diagram/drawing of pooter

Quality (0)

Stopper/rubber bung with two openings (RO) x1

Two delivery tubes one longer than the other x1

Inner end of shorter delivery tube with mesh/gauze(IM) x1

(c) Symbiotic relationships in organisms

Trichonympha Protozoa living in the gut of a termite;

Helps the termite to digest cellulose; while the protozoa trichonympha gets protection and food in return from the termite.

Sea anemone attaching itself to the shell of hermit crab; thereby enjoying pieces of leftover food therein. The hermit crab in turn enjoys protection against predators/ the sea anemones stings prevent the predators from harming the hermit crab.

Algae and fungi in a lichen; Lichen is made up of a fungus and a unicellular alga living together. The green alga produces food/photosynthesis for the association; the fungus protects the alga/absorbs water from the surrounding.

Rhizobium sp Nitrogen-fixing bacteria and root modules of leguminous plants. The Rhizobium fixes atmospheric nitrogen directly into the plant while rhizobium enjoys shelter/food/nutrients from the plant.