The microscopic organisms at the base of the marine food chain are known as plankton.
Plankton are mostly microscopic animals and plants found drifting or floating I he ocean or in large bodies of fresh water , consumed as food by almost all aquatic animals.
Plankton which are more plant-like are referred to as phytoplankton, while plankton which more animal - like are referred to as zooplankton. However many plankton species are neither animal nor plant, rather they are organisms belonging to the kingdom Protista.
Examples of phytoplankton include diatoms, coccolithophores and dinoflagellates. These are the most common phytoplankton.
Zooplanktons include jellyfish, Portuguese Man o' War, copepods and isopods.
Answer:
many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.
Explanation:
Mold is a biotic component of the environment. It's a living organism that contributes significantly to the decomposition of dead matter. While molds are influenced by abiotic factors such as sunlight and salinity, they are themselves living and thus part of the biotic factors.
Mold is a biotic component, which means it's a living part of the environment. It consists of multicellular organisms that play critical roles in the decomposition of dead plants and animals. While they can be found in various environments, molds are categorized by their ability to grow as long filaments that form visible colonies.
Molds are critical to the life cycle and energy exchange in many ecosystems, contributing to critical biological processes. Abiotic factors, such as salinity and sunlight, influence the distribution and prevalence of molds in various ecosystems, but these are non-living components of the environment.
Simply put, molds are important organisms that contribute to the decomposition process and are considered part of the biotic factors in an environment due to their living nature, unlike abiotic factors such as water, air, soil, sunlight, and salinity.
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An amino acid is usually considered as the building block of a protein, is a constituent that plays a significant function in the body. The amino acids are required for essential activities like the synthesis of neurotransmitters and hormones and manufacturing of proteins.
There are different kinds of amino acids found, however, all these amino acids possess three constituents, which are common to all the amino acids. These are an amino group, a carboxyl group, and an R group.
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After a human skin cell, which is made up of 46 chromosomes, undergoes mitosis, it divides into two new cells, each containing the same number of chromosomes as the original cell - 46.
A human skin cell, or a somatic cell, contains 46 chromosomes. This includes 22 homologous pairs and one pair of sex chromosomes, a configuration known as diploid (2n). When a somatic cell undergoes mitosis, which is a process of cellular division, it creates two identical daughter cells. Each of these new cells will contain 46 chromosomes, the same as the original cell, maintaining the diploid (2n) condition. This is because mitosis involves the replication of DNA, alignment of chromosomes at the metaphase plate, splitting of sister chromatids, and reformation of the nucleus, ensuring that the resultant cells have the same genetic composition as the parent cell.
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B) Mutations can be positive and produce organisms with improved traits.
C) Mutations can be fatal to the organism that has a mutation, if the mutation is in a critical gene.
D) Mutations can be silent, and not affect the organism that has them, if the mutation is in a non-critical area.
Answer: The correct answer is- A) Mutations must be present in parents and then passed to offspring.
Mutation can be described as the permanent change in the genetic material ( DNA) of an organism. It can be beneficial or harmful to the life form. Mutations can be heritable ( that is passed from one generation to the next) or non inheritable ( not passed from parents to offsprings).
A silent mutation ( change in the nucleotide sequence without any change in the amino acid sequence) that does not show any observable effects in the phenotype of the organism.
Thus, only option A) is not true about mutation.
All the statements are true about mutations except Mutations must be present in parents and then passed to offspring.
Thus, An organism's observable traits, or phenotype, may or may not change as a result of a mutation. Evolution, cancer, and the maturation of the immune system, including junctional variety, are among the normal and malignant biological processes in which mutations play a role.
All genetic variety originates from mutation, which also provides the basis for the action of evolutionary forces like natural selection.
Sequence changes can take many distinct forms as a result of mutation. Gene mutations can have no effect, change the gene's product, or stop the gene from working fully or correctly. Non-genic areas are likewise susceptible to mutation.
Thus, All the statements are true about mutations except Mutations must be present in parents and then passed to offspring.
Learn more about Mutation, refer to the link:
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