The answer is; A
In the lymph vessels, a few lymphocytes ‘ patrol’ the tissues as they scan for antigens. When they detect an antigen, including surface antigens of rogue cells (cancer cells), the antigen-presenting cells (APCs) present this to the cognate lymphocytes turning them to effector cells (such as effector T-cells). The effector T- cells bind to the cancer cells and induce apoptosis.
Answer: Option D
Explanation: this depends on the food source and energy they utilize
Autotrophs are organisms that obtain their food source and energy by synthesizing these themselves using raw materials and energy (energy from the sun) they do this in the process known as photosynthesis obtaining energy from sunlight and they are also classified as autotrphs due to the presence of some components/features that will enable them to be able to synthesize their food for example, plants are autotrophs and they possess chloroplants: an organelle that contains chlorophyll that helps to channel the energy of sunlight into chemical energy and as well also gives plant their characteristic green color. They are also known as producers
Heterotrophs are organisms that rely on producers or other heterotrophs to obtain their food and energy. They either depends directly or indirectly on the producers for their energy source i.e. herbivores egg goats that feed directly on plants like grass; carnivores e.g lion that feeds on the herbivores this depending indirectly on plants.
Answer:
Differentiate between tricuspid valve and bicuspid valve
<u><em>The tricuspid valve is positioned between the right atrium and right ventricle, whereas the bicuspid valve is located between the left atrium and left ventricle. Furthermore, the tricuspid valve has three cusps, whereas the bicuspid valve has only two. Valve that connects the heart's left atrium and left ventricle.</em></u>
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Explanation:
