POST UTME Oou Biology Past Questions And Answers
Which of these animals is not metamerically segmented
- A) tapeworm
- B) earthworm
- C) centipede
- D) shark
Correct Answer: D) shark
Explanation
This Biology question is asking which animal is not metamerically segmented. Metamerically segmented means that the animal's body is made up of repeated segments that are similar in structure. The options given are tapeworm, earthworm, centipede, and shark. Tapeworms are flatworms that are parasitic. They have a long, ribbon-like body but do not have segmented bodies, so they are not metamerically segmented. Earthworms, on the other hand, have segmented bodies, which allows them to move efficiently. Each segment has muscles and bristles that help them move through the soil. Centipedes are also metamerically segmented, with each segment having a pair of legs. They are predatory arthropods and use their legs to hunt for prey. Sharks, the correct answer, are not metamerically segmented. Although they have a skeleton made of cartilage and have some repetitive structures, their body is not divided into segments like that of an earthworm or centipede. In conclusion, the animal that is not metamerically segmented is the shark. It is important to understand different body structures of animals as it helps us classify them better.
Manufactured food in the plants is transported through the
- A) xylem
- B) phloem
- C) cambium
- D) cortex
Correct Answer: B) phloem
Explanation
Plants produce food through a process called photosynthesis. The manufactured food needs to be transported from the leaves, where it is produced, to other parts of the plant where it is needed. This transportation of food is done by a specialized tissue called vascular tissue. Vascular tissue is made up of two types of tissues: xylem and phloem. Xylem is responsible for transporting water and minerals from the roots to the leaves, while phloem is responsible for transporting manufactured food from the leaves to other parts of the plant. This means that the correct answer to the question is Option B: phloem. Cambium is a type of tissue responsible for the growth of the plant, while cortex is a type of tissue found in the outer layer of the stem and roots of a plant. It is not involved in the transportation of food. In summary, the transportation of manufactured food in plants is done by the phloem tissue, making Option B the correct answer. It is important for biology students to understand the different types of plant tissues and their functions.
The sterile individuals in the honey bee are known as
- A) Drone
- B) Queens
- C) Workers
- D) None of these
Correct Answer: C) Workers
Explanation
The drone doesn't work but it's only work is to fertilize the queen, then that means it isn't sterile. The sterile individuals are the workers.
Spear grass has underground structure called
- A) bulbs
- B) corm
- C) rhizomes
- D) tap roots
Correct Answer: C) rhizomes
Explanation
of spear grass. Spear grass is a type of grass that grows in the ground, but part of it is also underground. The question is asking what this underground structure is called. The options given are: bulbs, corm, rhizomes, and tap roots. Bulbs are a type of underground storage organ that some plants have. Corms are similar to bulbs, but they are more solid and have less fleshy leaves. Tap roots are a type of root system where there is one main root that grows deep into the ground. The correct answer to the question is C, rhizomes. Rhizomes are a type of underground stem that grows horizontally just below the surface of the ground. They are often found in plants that spread out and form new shoots or plants. Knowing the different types of underground structures in plants is important for understanding how they grow and reproduce. For example, some plants can be propagated by dividing their rhizomes, while others can be grown from bulbs or corms. To learn more about this, please read the relevant sections of the recommended textbooks.
An ecosystem is composed of all of the following except:
- A) Plants
- B) Animals
- C) Temperature
- D) Meadows
Correct Answer: C) Temperature
Explanation
An ecosystem refers to all living and non-living things in an environment and how they interact with each other. This question is asking which of the following is NOT part of an ecosystem. The options provided are Plants, Animals, Temperature, and Meadows. Plants and animals are living things that are commonly found in ecosystems. They interact with each other and with non-living things such as water, rocks, and soil. Meadows are also part of ecosystems and they provide habitats for many species of plants and animals. However, Temperature is not a living or non-living thing, but rather a physical factor that affects living things in an ecosystem. Temperature refers to how hot or cold the environment is, and it can affect things like the growth of plants, the behavior of animals, and the availability of water. So, the correct answer to this question is Option C: Temperature. It is important to note that while temperature may not be part of an ecosystem, it is still an important factor that can affect the health and survival of living things within an ecosystem. Other physical factors that can affect ecosystems include water availability, sunlight, and soil nutrients.
Which of the following is used mainly for balancing in fish?
- A) the caudal fin
- B) The pectoral fin
- C) The anal fin
- D) The dorsal fin
Correct Answer: D) The dorsal fin
Explanation
The fins are composed of bony spines protruding from the body with skin covering them and joining them together. Fins are used for movement, stability, nest-building, spawning, and as organs of touch. They can be single or paired. The caudal or tail fin is used for propulsion. Fish that have forked caudal fins usually are fast swimmers. The anal fin stabilizes the fish and provides propulasion while it is swimming. Ventral fins are also used to provide stability in swimming. The paired pectoral fins are used for manoeuvering the fish. The single dorsal fin helps balance the fish while swimming and also during sudden movements or turns. The rays of this fin are often sharp, and a spine is often present.
One of this is not a continuous variation
- A) height
- B) weight
- C) tongue rolling
- D) skin colour
Correct Answer: C) tongue rolling
Explanation
This Biology question is asking about continuous variation and which of the options listed is not an example of it. Continuous variation is the variation of traits that show a range of values, such as height or weight. The question asks which one of the options is not an example of continuous variation. Out of the four options given, three are examples of continuous variation - height, weight, and skin colour. However, the correct answer is option C, which is tongue rolling. This is because tongue rolling is not a trait that shows a range of values. Instead, it is a trait that is either present or absent, meaning that it is a discrete variation. Discrete variation is the variation of traits that can only be grouped into certain categories, such as blood type or the ability to taste bitter substances. In contrast, continuous variation is the variation of traits that show a range of values, such as height or weight. To summarize, the answer to this Biology question is option C, tongue rolling, because it is not an example of continuous variation like the other options listed. Instead, it is an example of discrete variation.
The sexual reproductive units produced by mature individuals of sexually reproducing species of organism is called
- A) sperms
- B) ova
- C) zygotes
- D) gametes
Correct Answer: D) gametes
Explanation
In sexual reproduction, organisms produce special cells called gametes which are used to unite with the opposite sex to form a new individual. These gametes are produced by mature individuals of sexually reproducing species. The question is asking for the name of these sexual reproductive units. The options given are sperms, ova, zygotes, and gametes. Sperms are the male gametes produced by males while ova are the female gametes produced by females. Zygotes, on the other hand, are the cells formed as a result of the fusion of gametes during fertilization. Therefore, the correct answer to this question is option D: gametes. Gametes are the sexual reproductive units produced by mature individuals of sexually reproducing species of organism. It is important to note that gametes are haploid cells, meaning they contain half the number of chromosomes compared to the somatic cells of the organism. This is important because during fertilization, when two gametes fuse, the resulting zygote will have the normal number of chromosomes of the species. Overall, gametes are essential for sexual reproduction as they are the cells that unite during fertilization to form a new individual with a unique combination of genetic material from both parents.
The reproduction of cell is controlled by which of the following:
- A) RNA
- B) DNA
- C) mRNA
- D) Mitosis
Correct Answer: B) DNA
Explanation
The question is asking about what controls the reproduction of cells. The options are RNA, DNA, mRNA, and Mitosis. The correct answer is B, DNA. DNA is found in the nucleus of cells and it contains the genetic information that controls the characteristics of an organism. When a cell reproduces, it must first replicate its DNA so that the new cell will have the same genetic information as the original cell. This process is called DNA replication. Mitosis is the process of cell division, which is controlled by the DNA. mRNA is a type of RNA that carries genetic information from the DNA to the ribosomes, where it is used to make proteins. So, while mRNA is involved in the process of protein synthesis, it does not control the reproduction of cells. Therefore, the correct answer is B, DNA.
Which of these organisms is a primary consumer?
- A) cassava
- B) grasshopper
- C) hawk
- D) lizard
Correct Answer: B) grasshopper
Explanation
This Biology question is asking which of the organisms listed is a primary consumer. A primary consumer is an organism that feeds on producers, which are usually plants. The options listed are cassava, grasshopper, hawk, lizard, and toad. Out of these options, the correct answer is B: grasshopper. This is because grasshoppers are herbivores, which means they feed on plants. In this case, they are feeding on producers, which makes them primary consumers. Cassava, on the other hand, is a plant and is therefore a producer. Hawks, lizards, and toads are all examples of secondary consumers, which means they feed on other animals. They are not primary consumers. It's important to understand the different levels of the food chain and the roles that different organisms play. Primary consumers are an important part of the food chain as they provide energy to the organisms higher up in the chain. To learn more about this, please read the relevant sections of the recommended textbooks.