Answer:
The energy comes from electrons produced by oxidation of biological molecules.
Explanation: In photosynthesis, the energy comes from the light of the sun.
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Answer:
Immunity to Small Pox
Explanation:
Over the years, Europeans had built up an immunity to smallpox because many had contracted the disease and still survived. As the population grew children were born with some immunity to the disease. When the Europeans arrived in the Americas, and smallpox spread around the native peoples, the Europeans did not contract the disease because they were immune. However, since the natives were not immune, they slowly died of due just to the disease as well as some parts of the war between the europeans.
El sistema inmune innato se compone principalmente de barreras físicas, como la piel y las membranas mucosas, barreras químicas, a través de la acción de péptidos antimicrobianos y especies reactivas de oxígeno [4], células inmunes innatas y mediadores solubles como el sistema del complemento, anticuerpos innatos
Explanation:
The nucleus is the cell's control center
<h2>Cycads and Palm</h2>
Explanation:
The resemblance between cycads and palm trees is only superficial
- Cycads are basically woody plants which have roots, a stem, leaves and reproductive structures known as cones
- The main roots of cycads are thickened and fleshy and as they may have storage capacities they are often termed tuberous
- Along with the fleshy stem they may have contractile properties which serve to regulate the level of the stem in the ground
- Specialized, upright-growing, branched roots, known as coralloid roots, are also produced by all species of Cycads
- The stems of cycads may be completely subterranean or emerge from the ground and be trunk-like
- The leaves of most cycads are once-divided (pinnate) and often develop an attractive palm-like crown
- Palm trees are a type of evergreen plant belonging to the Arecaceae family of plants
- Palm trees have branch-less stems and large evergreen leaves
- Generally, leaves of palm trees are either pinnate (feather-like leaves) or palmate (fan-like fronds)
- Another way to identify the type of palm tree is by the trunk shape, some of the tallest species of palm trees have long slender single trunks and dwarf varieties have usually short fat palm trunks
- Some smaller palm tree species may have clustered trunks with 3 or 4 short trunks growing together
- There are also some dwarf palm trees that just have bushy pinnate fronds growing out the ground and don’t have any trunk at all
