Answer:
Composite, shield, cinder cones, and supervolcanoes are the main types of volcanoes.
Composite volcanoes are tall, steep cones that produce explosive eruptions.
Shield volcanoes form very large, gently sloped mounds from effusive eruptions.
Volcanoes have several shapes, which are controlled by the composition of the magma and the nature of its eruption. If a volcano produces very fluid lava (low in the compound SiO2, or silica), the magma flows a long distance before it cools, making a flat, shield-shaped volcano.
Explanation:
The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary (K–T) extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago.
Answer:
(C). white blood cell production
Explanation:
CSFs (colony stimulating factors) are glycoproteins that activate intracelluar pathways and promote proliferation of hemopoietic stem cell to form immune cells (white blood cells).
CSFs are released in response to infection and interacts with blood stem cells to produce new immune cells. These resulting new immune cells create an army of cells to fight against the infection and provide immunity.
Thus, the correct answer is option (C).
Answer:
False
Explanation:
Toxoplasma is a congenital disease that is characterized by mild muscle aches, tender lymph nodes, etc. and in some immuno-compromised individuals, seizures and coordination loss may occur. I
The disease is caused by a protozoan known as <em>Toxoplasma gondii </em>and its infection is usually by eating foods (usually meats) that contain the cyst of the organism or making contact with cats that are infected in addition to infected mother-baby transmission, especially during pregnancy.
<em>Hence, humans can contract the organism not just by exposure to an infected cat but also by eating meats that contain the cysts of the organism.</em>
Answer: 37.2 trillion cells
