In chemical reactions the substances present at the start of the reaction are reactant and the substances produced are called product
The best answer is b - experiment.
An organized process that is used to gather and analyze observations and test a hypothesis is an experiment.
An experiment is the fourth step in scientific method after observation, question and hypothesis.
An experiment is a test that is carried out under controlled conditions with the purpose of demonstrating a known truth, determine the efficacy of a yet untried thing or to examine the validity of a hypothesis.
A hypothesis is a proposed solution for an occurrence that is still unexplained and which does not fit in current accepted scientific theory.
Answer:
Option (A)
Explanation:
The factors namely the temperature and rainfall plays a very significant role in maintaining the quality of the soil. A comparatively warmer temperature along with abundance of rainfall helps the soil to gain nutrients and increases its fertility. But a cooler temperature with lesser amount of rainfall does not provide the necessary elements to the soil. As a result of which the soil loses its fertility. In nature, these two factors occurs simultaneously, that controls the chemical composition of the soil.
Thus, the correct answer is option (A).
Answer: A food web consists of many food chains. A food chain only follows just one path as animals find food. eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web shows the many different paths plants and animals are connected.
Options found from a different source:
- The nucleus gathers amino acids and delivers them to the ribosomes, where they are processed by the rough endoplasmic reticulum to synthesize proteins.
- The nucleus provides the genetic information needed to direct the synthesis of proteins by ribosomes that are located on the rough endoplasmic reticulum.
- The ribosomes gather amino acids and deliver them to the nucleus, where they are processed by the rough endoplasmic reticulum to synthesize proteins.
- The ribosomes provide the genetic information needed to direct the synthesis of proteins by the rough endoplasmic reticulum that is located on the nucleus.
Answer:
2
Explanation:
To synthesise proteins in the cell, the nucleus provides information in the form of DNA. This DNA is transcribed into RNA. The RNA then moves to the cytoplasm, where it is translated at the ribosome, present on the rough endoplasmic reticulum. This occurs through the actions of tRNAs, which bring amino acids to the ribosome.
The sequence that the amino acids are linked together is based on the information from the DNA/RNA.
