Answer the following question given this paragraph: A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements. Periods 6 and 7 have 32 elements because the two bottom rows that are separated from the rest of the table belong to those periods. They are pulled out in order to make the table itself fit more easily onto a single page. Q: A period is a horizontal row of the what? Choices: - cycles table - phases table - species table - periodic table A:
periodic table
(Question)
Answer the following question given this paragraph: CHAPTER SUMMARY 31.1 Nutritional Requirements of Plants Plants can absorb inorganic nutrients and water through their root system, and carbon dioxide from the environment. The combination of organic compounds, along with water, carbon dioxide, and sunlight, produce the energy that allows plants to grow. Inorganic compounds form the majority of the soil solution. Plants access water though the soil. Water is absorbed by the plant root, transports nutrients throughout the plant, and maintains the structure of the plant. Essential elements are indispensable elements for plant growth. They are divided into macronutrients and micronutrients. The macronutrients plants require are carbon, nitrogen, hydrogen, oxygen, phosphorus, potassium, calcium, magnesium, and sulfur. Important micronutrients include iron, manganese, boron, molybdenum, copper, zinc, chlorine, nickel, cobalt, silicon and sodium. Q: Plants can absorb inorganic nutrients and water through their root system, and what gas from the environment? Choices: - hydrogen dioxide - nitrogen dioxide - chemical dioxide - carbon dioxide A:
(Answer)
carbon dioxide
Ques: Answer the following question given this paragraph: We obviously can't live without plants, but sometimes they cause us problems. Many plants are weeds. Weeds are plants that grow where people don't want them, such as gardens and lawns. They take up space and use resources, hindering the growth of more desirable plants. People often introduce plants to new habitats where they lack natural predators and parasites. The introduced plants may spread rapidly and drive out native plants. Many plants produce pollen, which can cause allergies. Plants may also produce toxins that harm human health (see Figure below ). Q: What are plants that grow where people don't want them to and can take up space and use resources which hinders growth of more desirable plants? Choices: - native plants - shrubs - grasses - weeds A:
Ans: weeds
(Q).
Answer the following question given this paragraph: Figure 10.4 Double-stranded DNA wraps around histone proteins to form nucleosomes that have the appearance of "beads on a string. " The nucleosomes are coiled into a 30-nm chromatin fiber. When a cell undergoes mitosis, the chromosomes condense even further. Q: Double strands of what wrap around histone proteins to form nucleosomes, which are coiled into a chromatin fiber? Choices: - bacteria - ribosomes - chromatids - dna A:
(A).
dna
Ques:Answer the following question given this paragraph: Bacteria lack many of the structures that eukaryotic cells contain. For example, they don't have a nucleus. They also lack membrane-bound organelles, such as mitochondria or chloroplasts. The DNA of a bacterial cell is also different from a eukaryotic cell. Bacterial DNA is contained in one circular chromosome, located in the cytoplasm. Eukaryotes have several linear chromosomes. Bacteria also have two additional unique features: a cell wall and flagella. Q: Bacterial dna is contained in one circular chromosome, located where? Choices: - neuron - mucus - cerebellum - cytoplasm A:

Ans:cytoplasm
Answer the following question given this paragraph: Scientists are regular people who chose to study science. They are experts in done or more fields of science. Q: What are people called that choose to study science? Choices: - engineers - lab technicians - doctors - scientists A:
scientists