FreeNotes
a. Which type of pollination is shown in this photograph? If the pollen is transferred from the same flower or another flower of the same plant, it is self-pollination. If the pollen is transferred from a different plant of the same species, it is cross-pollination. b. Write two adaptations of this type of flower that … Read more
a) Correctly name the parts labeled A, B, C, and D. b) Which stage of the life cycle is represented by the 8 labeled cells? The mature embryo sac before fertilization. c) Which cells will take part in the process of fertilization? The egg cell and the two polar nuclei. d) Which cell will later … Read more
National AIDS Control Program (NACP) in Pakistan: Awareness Campaigns: Educates the public about HIV/AIDS via media and workshops. Prevention Education: Targets high-risk groups with information on safe practices. Testing and Counseling: Provides HIV testing, counseling, and support services. Treatment and Care: Offers antiretroviral therapy (ART) and healthcare services. Collaboration: Works with international organizations for global … Read more
Parthenogenesis is a form of asexual reproduction in which offspring are produced without fertilization by a male. In this process, an egg cell develops into a complete organism without the need for sperm. Key Features of Parthenogenesis: Unfertilized Egg Development: In parthenogenesis, an unfertilized egg undergoes cell division and develops into an offspring. This can … Read more
Spore formation in Rhizopus (a type of mold) occurs through asexual reproduction, specifically via the formation of sporangia that contain spores. Here’s how the process takes place: Formation of Hyphae: Rhizopus starts as a mycelium, which consists of a network of thread-like structures called hyphae. These hyphae grow and spread out in the substrate (such … Read more
Budding in yeast is a form of asexual reproduction in which a new organism (bud) grows directly from the body of the parent organism. This process is commonly observed in single-celled organisms like Saccharomyces cerevisiae (baker’s yeast). Here’s how the process works: Initiation: A small outgrowth or bud forms on the parent yeast cell. This … Read more
Insect-pollinated flowers have developed several adaptations to encourage cross-pollination and ensure the transfer of pollen from one flower to another. Some of these adaptations include: Brightly colored petals: Flowers often have vivid colors (such as red, yellow, or blue) to attract insects like bees, butterflies, and beetles. Scented flowers: Many insect-pollinated flowers produce sweet, fragrant … Read more
Prokaryotes: Bacteria divide into two daughter cells through simple binary fission. Eukaryotes: Some unicellular protists (e.g., Amoeba, Paramecium) undergo mitotic division. Invertebrates: Some invertebrates like planarians reproduce by binary fission. Related Questions: Name the types of asexual reproduction in bacteria and protists. Name the types of vegetative propagation in plants. What are the advantages and … Read more
The third whorl of a flower is the androecium, consisting of stamens, which are the male reproductive organs. Each stamen has a filament and an anther that produces pollen grains. Related Questions: Name the types of asexual reproduction in bacteria and protists. Name the types of vegetative propagation in plants. What are the advantages and … Read more
Growth in human population: An increase in the number of people over time. Effects: Overpopulation, food shortages, environmental pollution, depletion of resources, increased unemployment. Related Questions: Name the types of asexual reproduction in bacteria and protists. Name the types of vegetative propagation in plants. What are the advantages and disadvantages of vegetative propagation? What is … Read more