An atom is the smallest particle of a substance that has all the properties of the substance.
Every atom is composed of a nucleus and one or more electrons which are bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons as well. Only the most common variety of hydrogen has no neutrons in it.
The electrons of an atom are attracted to the protons in an atomic nucleus through the electromagnetic force. The protons and neutrons in the nucleus are attracted to each other with the help of nuclear force. This force is usually stronger than the electromagnetic force which repels the positively charged protons from one another in the nucleus. Under certain circumstances, the repelling electromagnetic force between protons become stronger than the nuclear force. In this case, the nucleus splits and leaves behind different elements. This is a type of nuclear decay.
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A controlled experiment is crucial for isolating the effects of a single variable, making it easier to interpret the results.
All variables save the one being researched (the independent variable) are held constant in a controlled experiment. This enables researchers to draw more precise conclusions regarding the link between independent and dependent variables.
It would be difficult to identify whether the outcomes were attributable to the variable being examined or some other factor without control groups and uniform circumstances. Controlled experiments improve the reliability and validity of data obtained, laying the groundwork for scientific ideas and applications.
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B. have limitations
C. comeplete
D. represent old infortmation
The scientific models always exhibits limitations.
• All the scientific models exhibit limitations as they are not representative of every possible scenario.
• Scientific models are not a substitution for experimentation, they can be used in combination with experimentation to further comprehend a concept, process, or event.
• The scientific models are based on present scientific knowledge and may have to be changed when novel discoveries are made.
Thus, all the scientific models have limitations, the correct answer is option B.
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Genes
Traits are inherited from parents in the form of allele carried by genes which leads to the expression of certain physical attributes in a human race. A genetic characteristics is expressed only when it gets contribution from both the parents which means half of the chromosomes carrying genetic material is contributed by mother while rest half of chromosomes are contributed by father.
Answer:
Biotic and nonliving
Explanation:
Biotic - A biotic component is relating to living organisms or resulting from it. For example animals, plants, bacteria, table, chair etc.
Abiotic - Abiotic components are not derived from the living organisms, that is they are not biological instead they are physical. For example wind temperature etc.
Living - Living things are those things that were once or that are now alive. For example humans. They can also feel happiness, anger etc.
Non-living things are those which were never alive for example bucket, rock etc.
b. non-vascular plants.
c. bryophytes.
d. mosses.
The correct answer is a. vascular plants.
Vascular plants with larger sporophytes are gymnosperms, examples are conifers such as Cycas, Pinus and angiosperms, examples flowering plants are mango, sunflower. The dominant phase in these plants are diploid, independent sporophyte which produces two types of spores. Gametophyte is short lived and dependent on sporophyte.