The fossil records of primitive plants show a variety of seed dispersal mechanisms that has been adopted by plants at various stages and how they have evolved. The most primitive of this seed dispersal mechanism is the Anemochory
Anemochory is the dispersal of seed through the wind. The seeds have wing like structures and are lightweight to be able to fly away with the wind. They are dull colored and are pale that will prevent the seed from being visible.
Hydrochory is the next order of evolution of the seed dispersal mechanism which became majorly adopted by plants that tend to grow near water sources and those whose seeds are too heavy to fly in the air. One of the best examples is the coconut that falls off on the sea water in the coastal areas and floats to other lands and sprouts to a new plant.
Barochory is the dispersal of the seed through gravity. This is the mechanism where the fruit falls off to the ground due to gravity and grows into a new plant.
Endozochory is the dispersal of the seed through animals. In this case the seed is usually covered with a fleshy edible part which is consumed by the animals and in this process the seed goes into the digestive system of the animal and is excreted in a different place from where the seed can sprout into a new plant.
Ballochory is the dispersal of the seed due to the forceful ejection of the seed by explosive dehiscence of the seed. This lets the plant to place its seeds in a distant area. One of the best examples is the Hura Crepitans which is also called the dynamite tree, named after its exploding fruits.
Answer:
This question is asking to state what is being defined. The term defined in the question is called DIFFUSION
Explanation:
Diffusion is the movement of particles/fluids from a region where they are highly concentrated to the region where they are less in concentration across a space. Diffusion is a form of passive transport i.e does not require energy input to occur. This is because the movement occurs down a concentration gradient.
A concentration gradient i.e difference in concentration occurs when there is an uneven amount/concentration of particles in two regions. Hence, movement occurs naturally to the direction where the particles are less concentrated from where they are more concentrated.
Answer:
Light-dependent reaction of the photosynthesis takes place in the thyllakoid membrane of the chloroplast. It converts solar energy into the chemical energy (ATP and NADPH) which is then utilized in the light-independent reaction to fix carbon into glucose or food.
The correct order of events that take place during light-dependent reaction would be:
Energy from the Sun ejects electrons from chlorophyll and splits water molecules to yield hydrogen ions.
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Electrons move down the electron transport chain, releasing energy that pumps hydrogen ions into the thylakoid space.
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The concentration of hydrogen ions in the thylakoid space increases.
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Hydrogen ions diffuse across the thylakoid membrane into the stroma through ATP synthase.
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ATP synthase uses the energy released as hydrogen ions move from regions of high concentration to regions of low concentration to make ATP.
<u>Answer:</u>
The threats of California soil resources are soils, urban development
<u>Explanation:</u>
Native soils, unmodified by human activity, are becoming rare and we are losing the valuable power they provide. Soils in the Delta continue to subside.
Urban development has expanded into vast acres of prime farmland in California, diminishing our capacity to produce sustainable food and fiber.Increased fire frequency will increase soil erosion, resulting in depletion of nutrients from the soil and polluting the surface waters that receive the runoff.
the answer is fossils I just took the test seismographs is incorrect
