Plants Short Answer
| # | Answer |
|---|---|
| 1 | Photosynthesis is the process plants use to make glucose from carbon dioxide and water using sunlight. Oxygen is released as a byproduct. |
| 2 | Roots usually absorb water from the soil, especially through root hairs. |
| 3 | Plants take in carbon dioxide from the air for photosynthesis. |
| 4 | Plants release oxygen during photosynthesis. |
| 5 | Leaves are broad and thin, which gives them a large surface area to absorb sunlight. They also contain many chloroplasts. |
| 6 | Chlorophyll is the green pigment in chloroplasts that absorbs light energy for photosynthesis. |
| 7 | Roots anchor the plant in the soil and can also store food in some plants. |
| 8 | Transpiration is the loss of water vapor from plant leaves, mainly through stomata. |
| 9 | Stomata are openings that let carbon dioxide enter and oxygen exit. They also help regulate water loss. |
| 10 | In general, more sunlight increases photosynthesis until another factor becomes limiting. Too much light can eventually stop increasing the rate. |
| 11 | Xylem transports water and minerals from the roots upward. Phloem transports sugars made in photosynthesis to the rest of the plant. |
| 12 | Plants need minerals to build important molecules and carry out life processes. For example, nitrogen is needed to make proteins and chlorophyll. |
| 13 | A nitrogen deficiency can cause slow growth and yellowing leaves. The plant may not produce enough chlorophyll or proteins. |
| 14 | Green plants are producers because they make their own food through photosynthesis. They form the base of many food webs. |
| 15 | Plants remove carbon dioxide from the atmosphere during photosynthesis and store carbon in their tissues. When plants respire, decompose, or burn, carbon can return to the air. |
| 16 | Plants move water from the soil into the atmosphere through transpiration. This adds moisture to the air and can influence cloud formation and precipitation. |
| 17 | A plant may wilt because it loses water faster than its roots can absorb it. The cells lose turgor pressure, causing the plant to droop. |
| 18 | Turgor pressure is the pressure of water inside plant cells against the cell wall. It helps keep stems and leaves firm. |
| 19 | Leaves can cool the plant by releasing water during transpiration. Their shape and surface features can also affect how much heat they absorb. |
| 20 | Small or modified leaves reduce water loss in dry environments. This helps the plant conserve water. |
| 21 | A cactus has a thick stem that stores water and leaves reduced to spines to limit water loss. Its features help it survive drought conditions. |
| 22 | Deep roots can reach water stored farther below the surface. This helps the plant survive during dry periods. |
| 23 | Roots hold soil particles in place and make the ground more stable. This reduces erosion by wind and water. |
| 24 | Plant roots help bind soil and improve slope stability. This can reduce the chance of soil slipping downhill after heavy rain. |
| 25 | Forests can cool the air through shade and transpiration. They also affect humidity and can moderate temperature changes. |
| 26 | Deforestation reduces the number of plants removing carbon dioxide from the air. If trees are burned or decay, stored carbon is also released. |
| 27 | Wetland plants slow water movement and help trap sediments and some pollutants. They can also take up excess nutrients. |
| 28 | They produce oxygen and act as primary producers in water ecosystems. They support food chains by making energy-rich organic matter. |
| 29 | Invasive plants can outcompete native species for light, water, and nutrients. This can reduce biodiversity and change habitat conditions. |
| 30 | The plant may use stored nutrients and survive temporarily. Over time, a lack of essential minerals limits growth and reproduction. |
| 31 | Soil texture affects how well water and air move through the soil. For example, sandy soil drains quickly, while clay holds more water but may have less air space. |
| 32 | Root hairs greatly increase the surface area available for absorbing water and minerals. This makes uptake more efficient. |
| 33 | Guard cells open and close stomata to control gas exchange. When they close, they reduce water loss, but they also limit carbon dioxide intake. |
| 34 | A plant may grow taller or larger leaves to capture more light. However, if the light is too low, growth may still slow because photosynthesis cannot meet energy needs. |
| 35 | The upper part of the leaf receives more sunlight, so having more chloroplasts there improves light capture. This increases photosynthesis efficiency. |
| 36 | Photosynthesis works best within a certain temperature range because enzymes function best there. Very high or very low temperatures can reduce enzyme activity and slow the process. |
| 37 | Plant roots release substances that support microbial life, and microbes can help break down organic matter or make nutrients more available. Some microorganisms also form helpful partnerships with roots. |
| 38 | Nitrogen-fixing bacteria convert nitrogen gas into forms plants can use. This helps plants grow in soils that lack enough available nitrogen. |
| 39 | Different plant species use resources in different ways and respond differently to change. This can help an ecosystem resist disturbances and recover more quickly. |
| 40 | One impact is increased soil erosion because roots no longer hold the soil in place. Another is higher atmospheric carbon dioxide because fewer trees are removing it through photosynthesis. |