Correct answer: D) From bacteria living in their roots
Nitrogen is an essential plant nutrients, but it is metabolically unavailable to higher plants and animals. It is available to some species of microorganism by biological nitrogen fixation in which nitrogen is converted to ammonia with the help of enzyme dinitrogenase.
The process of breaking apart the two atoms in a nitrogen molecule is called nitrogen fixation. Plant obtain the nitrogen they need from the soil which is already fixed by the bacteria and archae.
Example: <em>Azobacter</em><em>,</em> Nostac
Answer:
The correct answer would be "The female cone releases its seeds and new sporophytes grow".
Conifers are sporophytes with two types of cones; pollen cones and ovulate cone.
The pollen cones are smaller in size and produce microspores which would develop into the pollen grains.
The ovulate cones are larger in size which produce megaspores which would develop into ovule.
The two gametes fertilized to produce a diploid zygote which develops into the embryo.
The fertilization takes place in the ovule and thus, embryo or seed is developed in the female cone.
The female cone then releases its seed which grows into a new sporophyte.
Answer:
igneous intrusion, extrusion, faults
Explanation:
Folding, tilting, faults, igneous intrusion, extrusion, and unconformities all disturb rock layers
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