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Sue planted 4 times as many apple seeds as she planted orange seeds. 15% of the apple seeds grew into trees, and 10% of the orange seeds grew into trees. If a total of 420 apple trees and orange trees grew from the seeds, how many orange seeds did Sue plant?
A teacher along with his students is carrying out a study on germination of seeds. They take some dry seeds of different kinds and plant them in different physical conditions. They observe, measure and discuss the growth over a period of time. During the course of the activity, teacher asks questions which require various process skills. The questions asked by the teacher are given in column I Match these with the appropriate process skills   Column I   Column II (A) What are the differences between seeds of different type (i) communication (B) Why do you think some seeds are growing more quickly than others? (ii) predicting (C) Draw a diagram to depict the changes in the seeds (iii) observing (D) Based on your observation what do you think would happen if we double the amount of water (iv) hypothesising
Seeds are great travellers they can reach far and wide. Which of the following statements about seed dispersal is true? A. Animals eat apples and pass their seeds in their stool. B. Mangrove seeds disperse by water. C. Seeds of the orchid plant attach to animals using hooks. D. Soyabean seeds disperse by bursting.
Statement 1: The microbial deterioration of fresh fish is _____ by irradiation. Statement 2: The _____ of oxygen increases the sensitivity of vegetative bacteria to irradiation by two-three folds.
In a horticulture experiment , 200 seeds were planted in plot I and 300 were planted in plot II. 57 percent of the seeds in plot I germinated and 42 percent of the seeds in plot II germinated, what percent of total numbers of planted seeds was germinated?
Consider a measuring system consisting of a sensor, an amplifier and an oscilloscope. The sensitivity of each equipment is as follows : Sensor sensitivity : 0.4 mV/°C, Amplifier gain : 5.0 V/mV, and Oscilloscope sensitivity : 10 mV/V. What is the sensitivity of complete measurement system ?
Statement 1: Plastic films and other foils might get damaged due to irradiation. Statement 2: By increasing the radiation dose by a two-fold, the resistance of certain organisms to irradiation increases.
Engines are rated at specified conditions. Then which of the following statements are correct? 1. Power developed increases as local temperature increases. 2. Power developed increases as local temperature decreases 3. Power developed is not dependent on local temperature. 4. Power developed increases as local atmospheric pressure increases. 5. Power developed increases as local atmospheric pressure decreases.
A teacher asked students to investigate the germination of seeds of different plants under various physical conditions and posed many questions to them during the process. Match the questions with the corresponding processing skill they intend to develop.   Questions   Process Skill A) Which plant is sturdier: the one left in sun or the one left in shade? (i) Hypothesizing B) Why do you think some seeds are growing? (ii) Observing C) How many seeds of each kind are growing? (iii) Classifying
A teacher along with her class VII students is trying to understand how plants grow. They planted a number of tomato seeds at various depths and at various places in their school garden and took care of them. After some time, they observed that a few seeds began to develop as plants while others died out. The teacher asked the students to use their observations and think of the factors to due to which some seeds could not develop. Which process skill is likely to be developed through this exercise?