How do Organisms Reproduce?

SOLUTION : Variations and Natural selection is the basis of evolution. To adapt to changes and thrive in unfavourable environments, which leads to stable survival or eradication from the ecosystem, is advantageous to the species.The ecosystem won’t undergo a significant change as a result of the same change in one individual. Therefore, variation is beneficial …

Q. Why is variation beneficial to the species but not necessarily for the individual? Read More »

SOLUTION : The original copy of the information, including the instructions for creating the proteins and other chemicals that keep cells functioning, is found in DNA. Without it, cells wouldn’t be able to multiply and produce the molecules they require to exist, which would cause them to die. Now, the process by which two cells …

Q. What is the importance of DNA copying in reproduction? Read More »

SOLUTION : It helps a species survive, it lets us identify individuals, it helps organisms adapt to their environments and to environmental changes, but it also helps a species emerge strong if it is favoured by natural selection. A species needs variation if it is to survive since it makes it more disease-resistant.

SOLUTION : Populations of organisms fill well-defined places, or niches, in the ecosystem, using their ability to reproduce. The consistency of DNA copying during reproduction is important for the maintenance of body design features that allow the organism to use that particular niche. Reproduction is therefore linked to the stability of populations of species. However, …

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Solution : Organisms look similar because their body designs are similar. If body designs are to be similar, the blueprints for these designs should be similar. Thus, reproduction at its most basic level will involve making copies of the blueprints of body design. The chromosomes in the nucleus of a cell contain information for inheritance …

Q. DO ORGANISMS CREATE EXACT COPIES OF THEMSEL THEMSELVES? Read More »

Solution : The periods of adolescence are when the body experiences various changes that prepare it for sexual maturity. Starting at about age 10, adolescence lasts until you are 18 or 19 years old. Thirteen, fourteen, and fifteen are considered “teen” years because they fall during the time of adolescence. So, this period  is also known …

Q. What are adolescence and puberty? Read More »

Male Reproductive System The male reproductive system consists of portions which produce the germ cells and other portions that deliver the germ cells to the site of fertilisation. The formation of germ cells or sperms takes place in the testes. These are located outside the abdominal cavity in the scrotum because sperm formation requires a …

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Solution : Parts of Male Reproductive System Penis You might refer to it as the male organ that is in front during sexual activity. The root, body, and glans are the three components that make up the penis. It is significant to remember that a moveable layer of skin covers the glans or penis head. …

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Solution : Differences between Ovum (egg) and Sperm cell Ovum (egg) Ovum is the female gamete Bigger in size Spherical in shape Immobile ( non – motile ) No acrosome Contains only X chromosomes Produces in the ovary Sperm cell Sperm is the male gamete Long with tail, head and neck Smaller in size Mobile …

Q. Differentiate ovum and sperm. Read More »

Solution : STRUCTURE OF HUMAN SPERM : A head, neck, middle section, and tail make up sperm. The plasma membrane encloses the entire sperm body. The anterior portion of the head is covered by a cap-like structure known as the acrosome, and the head includes an extended haploid nucleus. This acrosome contains enzymes that aid …

Q. Explain the structure of sperm. Read More »