Answer:Scientists have long believed that the 14 species of finches on the Galapagos Islands evolved from a single species of finch that migrated to the islands one to five million years ago (Lack, 1940).
Explanation:
Answer:
Plants respire all the time, whether it is dark or light, because their cells need energy to stay alive. But they can only photosynthesize when they have light.
Explanation:
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A plant was placed in water containing black dye. After 24 hours the
plant was removed and sections were taken from the root and the
stem. In the root, cambium part will get stained and in the stem, cortex will be stained from dye so the correct option is D.
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What is cambium and cortex in plant root and stem?</h3>
Cambium is a layer of continuous dividing cells between xylem and phloem tissues which is responsible for the secondary growth of stems and roots. A cortex is an outer layer of a root or stem in a plant, located below the epidermis but outside of the vascular bundles.
The conduction (uptake) of water in a plant stem takes place through the xylem.
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Answer:
Fish and prawns = through gills
Frog = through lungs but also uses skin and lining of mouth for respiration
Amphibians,mammals and birds = through lungs
Tapeworms,earth worms and leeches = through body wall or skin
Amoeba and other unicellular animals = through plasma membrane
Explanation:
Answer:
xylem → vascular tissue for movement from roots to leaves
phloem → vascular tissue for movement from leaves to roots
Root Hair → increases surface area for water absorption
Meristematic tissue → Growing Sections
Guard Cells → open and close to allow gas exchange
Explanation:
The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.
Root hairs increase the surface area for the absorption of water and minerals from the soil.
Meristem is the name of the specific area where plant growth occurs.
Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.
Explanation:
