Answer:
People can transfer pollen from one flower to another, but most plants are pollinated without any help from people. Usually plants rely on animals or the wind to pollinate them. When animals such as bees, butterflies, moths, flies, and hummingbirds pollinate plants, it's accidental. hope that helps love!!
Pollen , coal and stems are evidences that plants existed in Antarctica.
Explanation:
- Pollens being highly resistant to temperature changes due to the presence of sporopollenin must have remained preserved in ice covered continent of Antarctica.
- Pollens are reproductive units of Plant that suggest existence of plants in the Ice covered land.
- Coal is formed as the fossilization of plants under anaeorobic conditions and high pressure. thus, this also suggest the existence of plants.
- Stems are plant parts thus clearly is an evidence that plants existed there.
<span>functions subconsciously: performed indirectly (without having to be actively initiated. Receives input from cerebral motor cortex, brain stem nuclei, and sensory receptors. Provides precise timing and appropriate patterns of skeletal muscle contraction for-smooth, coordinated movements and agility-ex: driving.</span>
Answer:
Sensors or sensory receptors must sense any change in blood glucose levels.
Explanation:
A feedback system includes a receptor, control center, and effector. The receptors serve to sense the deviation from homeostasis and send the nerve impulses or chemical signals to the respective control center. The control center receives input from receptors and sends nerve impulses or chemical signals to the effectors to bring about the desired change to restore homeostasis.
Negative feedback regulation of blood sugar includes sensing the rise or drop in blood sugar levels by sensory receptors. This sensory information is sent to the control center which in turn commands the effectors (pancreas) to secrete insulin or glucagon hormones to lower down or raise the blood glucose levels. Feedback regulation does not work in the absence of any of the components (sensory receptor, control center, and effector).
This gene could be analyzed to determine its homology level with a human gene, which then could be restored in its normal expression. This strategy can restore the normal phenotype in defective human cells.
Sequence homology, which refers to the level of evolutionary relationship among genetic or proteins sequences, is a fundamental subject matter to determine gene function.
From this approach (sequence homology search), researchers can identify valuable genes involved in diseases in which the restoration of their normal expression levels can be used to restore the normal phenotype in defective cells.
In this case, the identification of a gene in cockroaches that is responsible for nerve regeneration could be used for subsequent identification of a human homologous gene sequence, which then can be restored in order to treat human paralysis.
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