Q: What type of chemicals do ants communicate with? Read this paragraph and choose the correct option from the provided answers: We must use energy to get energy resources. This is true of non-renewable and renewable energy. Getting fossil fuels so that they can be used takes many steps. All of these steps use energy. Choices: - Alkanes - pesticides - hormones - pheromones A:
pheromones

(Question)
Q: Although lots of symbiotic relationships help both organisms, sometimes one of the organisms is harmed. when that happens, the organism that benefits, and is not harmed, is called a what? Read this paragraph and choose the correct option from the provided answers: Although lots of symbiotic relationships help both organisms, sometimes one of the organisms is harmed. When that happens, the organism that benefits, and is not harmed, is called a parasite . This type of relationship is known as parasitism. Choices: - child - viruses - infection - parasite A:
(Answer)
parasite

Ques: Q: Which cycle is named after the scientist melvin calvin? Read this paragraph and choose the correct option from the provided answers: The second stage of photosynthesis takes place in the stroma surrounding the thylakoid membranes of the chloroplast. The reactions of this stage can occur without light, so they are sometimes called light-independent or dark reactions. This stage of photosynthesis is also known as the Calvin cycle because its reactions were discovered by a scientist named Melvin Calvin. He won a Nobel Prize in 1961 for this important discovery. Choices: - krebs cycle - melvin cycle - melcal cycle - calvin cycle A:
Ans: calvin cycle

(Q).
Q: What carbohydrate from fruit juices is a gel-forming substance important in jelly making? Read this paragraph and choose the correct option from the provided answers: Pectin, a carbohydrate from fruit juices, is a gel-forming substance important in jelly making. Silica gel, a colloidal dispersion of hydrated silicon dioxide, is formed when dilute hydrochloric acid is added to a dilute solution of sodium silicate. Canned Heat is a gel made by mixing alcohol and a saturated aqueous solution of calcium acetate. Choices: - potassium - gelatin - cellulose - pectin A:
(A).
pectin

Ques:Q: Which period after birth has the most rapid growth? Read this paragraph and choose the correct option from the provided answers: Infancy is the period of most rapid growth after birth. Growth is even faster during infancy that it is during puberty. By the end of the first year, the average baby is twice as long as it was at birth and three times as heavy. Choices: - adolescence - middle childhood - early childhood - infancy A:

Ans:infancy

Question: Q: What type of species have a large effect on the balance of organisms in an ecosystem? Read this paragraph and choose the correct option from the provided answers: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in an ecosystem. For example, if all of the wolves are removed from a population, then the population of deer or rabbits may increase. If there are too many deer, then they may decrease the amount of plants or grasses in the ecosystem. Decreased levels of producers may then have a detrimental effect on the whole ecosystem. In this example, the wolves would be a keystone species. Choices: - decomposers - producers - secondary consumers - keystone A:
Answer:
keystone