Equinoxes are the moments in time when the Sun is directly over the Earth’s equator, and day and night are of equal length. They occur twice a year: around March 20 – 21 (the Vernal or Spring Equinox) and around September 22 – 23 (the Autumnal or Fall Equinox). During equinoxes, the length of day …
Spring: During springtime, temperatures gradually increase and the days become longer. Rainfall increases and plants start to bloom. Trees and plants are covered in new leaves and flowers. Animal life starts to become more active. Summer: Summer is the warmest season of the year. Temperatures and daylight hours reach their highest levels. Rainfall is usually …
The apparent movement of the Sun is known as the annual solar cycle. This cycle sees the Sun move from the winter solstice in December to the summer solstice in June, and then back to the winter solstice again. During this cycle, the Sun appears to rise in the east and set in the west, …
Perihelion is the point in the orbit of a celestial body (such as a planet or comet) that is closest to the sun. Aphelion is the point in the orbit of a celestial body (such as a planet or comet) that is furthest from the sun.
Parallelism of the Earth’s axis refers to the fact that the Earth’s axis of rotation is parallel to itself over time, meaning that it does not move or wobble in relation to the planet’s orbit around the sun. This is the main factor responsible for our regular seasons.
This is because in females, the process of meiosis produces a single ovum, which contains half the number of chromosomes as the parent cell. In males, meiosis produces four sperm cells, each containing half the number of chromosomes as the parent cell. This is necessary for the male reproductive system to create a variety of …
1. Apical meristem: Found at the tips of stems and roots, this type of meristem is responsible for primary growth and increases the length of the plant. 2. Intercalary meristem: Found at the base of leaves and nodes, this type of meristem is responsible for secondary growth. 3. Lateral meristem: Found in the vascular cambium …
Different kinds of meristem – വ്യത്യസ്ത തരം മെറിസ്റ്റം Read More »
Plants: Plants grow by forming new tissues and cells through the process of cell division. Their growth is mainly determined by environmental factors such as light, temperature, and water. Plants use photosynthesis to turn sunlight into energy, which helps them grow. Animals: Animals grow by increasing in size and mass. Their growth is mainly determined …
Loss of muscle mass and strength Poor balance, reflexes, and coordination Changes in vision, hearing, and sense of smell Decreased bone density and increased risk of osteoporosis Loss of skin elasticity and thinning of the skin Increase in wrinkles and age spots Hair loss and changes in hair texture Increased risk of dental problems due …
The physical peculiarities of old age – വാർദ്ധക്യത്തിന്റെ ശാരീരിക പ്രത്യേകതകൾ Read More »
Mitosis is the process of eukaryotic cell division where the cell nucleus splits into two identical daughter nuclei. It is followed by the division of the cytoplasm and the organelles, resulting in two daughter cells. Mitosis is a continuous process, which is divided into four stages: prophase, prometaphase, metaphase, anaphase, and telophase. During prophase, the …
Characteristic of mitosis – മൈറ്റോസിസിന്റെ സവിശേഷതകൾ Read More »