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4 years ago

What helps exploding pods disperse

1 answer:

6 0

Pods of certain plants such as gorse and pansies have a way of flinging their seeds when ripe in every direction with considerable force. The thing that helps these seeds disperse is first and foremost the mechanical force itself used to catapult the seeds.

As they ripen, the seed pods gradually lose moisture, building up tension in their cells and subsequently in the pod as a whole. The structure inevitably fails gradually and during a hot day it gives way altogether due to heat stress and triggers an explosion firing the seeds with appreciable force away from the parent plant almost like a projectile for up to 100m (300 ft) away.

It is important to note that plants which use this explosive method or ballistic dispersal as it is also called tend to have seeds that are generally large and too heavy to be carried by the wind unlike those of plants such as dandelions which are light enough for wind dispersal. Therefore gorse and suchlike plants employ ballistic methods to ensure their seeds travel as far away from the parent plant as possible.

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3 years ago

What vocabulary term could be used to describe the two types of cells you observed in a microscope that both look quite differen

Anton [14]

The term used to describe the two types of cell that looks different due to specific function they perform are called as differentiated cells.

<u>Explanation:</u>

Differentiated cells are those cells that have divided to perform specific function in an organism. Such cells unite to form a tissue. However, the stem cells possess the ability into different cell types to perform different functions. Some cells lose the ability to divide further.

Example - nerve cell. Plants are multicellular and thus has different types of cells to perform different functions. If such cells are visualized under the microscope, then they appear different in structure because of their difference in function.

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4 years ago

The damage caused by Tsunamis is restricted to the area surrounding the epicenter of the earthquake which caused it. True or fal

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False. Tsunamis can travel hundreds of miles from the epicenter on the ocean.

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3 years ago

1.Changes to a substance that do not involve a permanent reordering of atoms are know as

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1. Changes to a substance that do not involve a permanent reordering of atoms are know as a physical change.

2. Changes that reorder atoms to form new molecules, such as the reaction between sodium and chlorine ions to form sodium chloride, are known as chemical change.

3. What does the release or absorption of energy indicate? A chemical change

4. Which of these is an example of a chemical change? firework exploding

5. Which of the following changes can alter the form of a substance but does not necessarily change it to an other substance? all of the above

6. Chemical compounds undergo both physical and chemical changes. Which of the following is an example of a chemical change? salt (NaCl) being dissolved into water

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8. .If two poisonous elements are combined chemically, which of the following will be true of the resulting compound? The compound may or may not be poisonous, depending on the chemical properties of the new substance.

9. What type of change is described in the paragraph above? How do you know? This is a physical change, because the two substances were separated physically by boiling.

10. What conclusion should Max draw from his observations? The tablet that was placed in the water changed directly into a gas through a physical change.

11. Which of these is true of a chemical reaction? Energy is either released or absorbed.

12. What should you do to complete this task? To determine the substances, we will compare the physical and chemical properties of the two substances and perform tests to check if they are reacting the same way in the tests performed. If they react the same way, they are same.

13. Which of these is a chemical property of a substance? flammability

14. Atoms in the same _______ of the periodic share the same chemical properties. group (row)

15. Which of the following are physical properties? Check all that apply. conductivity, melting point, malleability, density and solubility

16. Which of the following represent chemical properties? Check all that apply. oxidation, combustibility , oxidation

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3 years ago

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3 years ago