Answer: Option B.
A see saw, chin raise.
Explanation:
A lever is a machine that can rotate and consist of a beam which is pivoted to fulcrum.
There are three classes of lever, the first class lever, second class lever and third class lever. These three classes of lever are classified base on the positions of effort, fulcrum and Load.
In first class lever, fulcrum comes between the effort and load. Examples is scissors , see saw, pliers. This is because effort is applied on the one side of the fulcrum and load is on the other side. Therefore, the childhood demonstration of first class lever motion is see saw and chin raise.
In the second class lever, load come between effort and fulcrum e.g wheelbarrow, bottle opener.
In the third class lever, effort comes between fulcrum and load e.g hammer, broom.
The macro nutrient that adds flavor and satisfies the appetite is FAT.
Fats also have other functions, these include:
It is essential for insulation.
It protects internal organs.
It transports fat soluble vitamins.
It is essential in the synthesis of hormones.
Answer:circle pentagon rectangle
Explanation:
The correct answer is "megaloblastic anemia".
In the event of deficiency of folic acid and/or vitamin B12, there will be inhibition of DNA synthesis in red blood cell precursors as well as other cells in the myeloid lineage. This results to continuous cell growth without cell division leading to large, immature red blood cells (hence the term megaloblastic) with low hemoglobin levels. Vitamin B12 deficiency particularly causes neuropathic symptoms such as neuropathic pain and numbness.
If megaloblastic anemia is caused by the resection of the portion of stomach that produces the intrinsic factor (important in the absorption of vitamin B12), then the condition is called pernicious anemia.
Answer:
The correct answer would be c. The cell has a greater level of structural support.
Phospholipds are the structural units of a cell membrane. They are consist of two components; hydrphobic lipids and hydrophylic polar heads.
They make a bilayer structure in which polar heads are in contact with water and lipid part are embedded within the layer.
- Lipid bilayer gives the rigidity or shape to the cell.
- It isolates the cell from the sorroundings.
- It is semi-permiable in nature and thus prevents or control the movement of substances across the membrane.
- Being liquid in nature, the cytoplasm would have dispersed in the surrounding in absence of cell membrane.
Hence, most appropriate choice would be c. The cell has a greater level of structural support.