Answer:
Photosynthesis is the process by which green plants manufacture their foods using the energy from the sun. Plants are the only living organism that have the ability to tap energy from the sun and use it to produce their food. The food produce by plants are used by plants and all other living organisms for survival. The herbivores feed directly on plants while carnivores feed on herbivores. The omnivores animals feed on both herbivores and carnivores. Thus, all living organisms on the earth depend on photosynthesis and on plants for the production of foods from which they derive the energy that they use to carry out their life activities.
Photosynthesis is essential to life on Earth as it provides organisms with energy, produces atmospheric oxygen, and contributes to biodiversity.
The process of photosynthesis is central to sustaining life on earth because it allows living organisms to harness energy from the sun and convert it into chemical energy in the form of glucose. This energy is then transferred through the ecosystem and used by heterotrophs for various biological processes, including growth and reproduction.
During photosynthesis, plants also produce oxygen, a by-product that is vital for aerobic respiration in most organisms. The oxygen we breathe and the food we eat are both direct products of photosynthesis, thus highlighting its importance in sustaining life on Earth.
The diversity of life forms we see today also owes much to photosynthesis, as the energy it captures has allowed organisms to evolve complex structures and thrive in different environmental conditions. As such, photosynthesis plays a major role in maintaining the global biodiversity.
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Answer:
In some communities, the phenomenon of competition can easily be depicted as compared to other communities. In some communities, there will be enough resources available and hence, these communities will have a fewer competition to be recognized. In other cases, some communities might require evolutionary changes to occur for the depiction of a competition. In such scenarios, it will be difficult to recognize competition at the time of its existence.
If human sperm and eggs were produced by mitosis instead of meiosis, they would be diploid cells, possibly resulting in a zygote with an excess of chromosomes. This imbalance could lead to nonviable offspring and developmental complications, as necessary components for early development are only present in the egg cell.
Currently, human sperm and eggs are produced by the process of
meiosis
, which results in
haploid cells
that contain half the number of chromosomes as the parent cell. If, hypothetically, sperm and eggs were produced by mitosis, they would be
diploid cells
with a full set of chromosomes similar to normal body cells. With such a change, sexual reproduction, as we understand it, could not occur, as the fertilization event would result in a zygote with four sets of chromosomes, creating a significant imbalance in genetic material. This could potentially lead to numerous complications and abnormalities in the offspring, likely making them nonviable. Additionally, critical components necessary for early development are present in the cytoplasm of the egg cell, without which, no subsequent development would occur. In conclusion, the production of sperm and egg cells via mitosis instead of meiosis would fundamentally alter human reproduction and could potentially lead to severe problems in offspring development.
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B. Both are multicellular and haploid, are often found in fossil remains, and have cell walls made of cellulose.
C. Both have cell walls made of cellulose, have xanthophyll as their chief photosynthetic pigment, and are multicellular.
Answer:
The correct answer is statement A.
Explanation:
Green algae belong to the division Chlorophyta and comprise about 9000 to 12000 species. Like higher plants, green algae possess photosynthetic pigments like carotene, chlorophyll a and b, and xanthophyll, in a similar proportion as found in higher plants.
A cell of green algae can be sessile or motile, and exhibits a central vacuole, and possesses a two-layered cell wall formed of cellulose and pectin. The storage of food takes place in the form of starch in the pyrenoids. Thus, due to the similarities in the features between the plants and green algae, it is considered that the embryophytes or the lands plants have emerged from green algae. Hence, statement A supports the belief.
Most scientists believe that green algae are the ancestors of plants due to their similar biochemical features. These include having cell walls made of cellulose, the storage of food material as starch, and the presence of chlorophyll a and chlorophyll b.
According to most scientists, the belief that green algae are the ancestors of plants is best supported by the statement: Both have cell walls made of cellulose, store food material as starch, and have chlorophyll a and chlorophyll b. These characteristics highlight the similar biochemical features that underline the evolutionary relationship between green algae and plants. The presence of cell walls made of cellulose provides structural similarities. Storage of food material as starch indicates similar metabolic processes, and both having chlorophyll a and chlorophyll b reveals their shared capacity for photosynthesis, a defining feature of plants.
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Answer:C
Explanation: