It is easy to launch the outer gas of the star so that it escapes from the star ! the final stage of the sun's life will be the ejection of the outer helium and hydrogen layers . These outer layers are hot and glow. The glowing hot ejected gases called a planetary nebula.
Here I provide you some examples of modified stems:
<u>Bulb:</u> discoid stems that have a single apical bud surrounded by numerous cataphiles, and in their part I have adventitious roots. Its function is the reserve.
<u>Tuber</u>: They are portions of stems with irregular growth, which forms tuberosities due to the large accumulation of reserve substances.
<u>Cladodes: </u>are flattened stems, very thick, green leaves look alike and have photosynthetic function.
<u>Stem tendrils:</u> they are filamentous stems, which can be rolled up so that the plant can climb grasped of various objects, which is useful when the plant needs to look for the greatest possible luminosity, especially in areas where shadows predominate.
Phylloclades: Stems sheet form with limited growth, like a leaf, green and photosynthetic color.
Answer:
Dentritivore
Explanation:
Dentritivores are heterotrophs that depend on other organisms to derive their nutrients from by feeding on their dead remains as well as consuming their feces. Dentritivores play an important role in the recycling of nutrients in an ecosystem and can be found almost at all trophic levels of the ecosystem. Dentritivores can be referred to as “bottom-feeders” in which in an aquatic habitat, most of them are found on the seabed. Other examples aside the vampire squid, include crabs, lobsters, sea stars.
Answer:
It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions.
Explanation:
Answer:
diffusion of the hormone through a target cell membrane
formation of a hormone-receptor complex
activation of a gene
cellular response to the hormone
production of a protein
Explanation:
Steriod hormone are primary hormones derived from lipids. Such as reproductive hormones i.e the testosterone and the estrogens, which are produced by the gonads (testes and ovaries). Steroid hormones are not soluble in water (they are hydrophobic). For a new cell to be activated by a steriod hormone, there are a lot of steps invovled, Steriod hormones must travel to their target cell bound to a transport protein (i.e diffusion of the hormone through a target cell membrane).
Once the hormone binds to the receptor in the targeted cell, a chain of events is initiated that leads to the target cell’s response (I.e formation of a hormone-receptor complex). Hormones plays a vital role in the regulation of physiological processes because of the target cell responses they regulate.
The message a hormone sends is received by a hormone receptor, (a protein located either inside the cell or within the cell membrane). The receptor will process the message by initiating other signaling events such as (activation of a gene) or cellular mechanisms that result in the target cell’s response. Hormone receptors recognize and respond to them (i.e cellular response to the hormone). Thus, the response triggered by a hormone depends not only on the hormone, but also on the target cell.
Once the target cell receives the hormone signal, it can respond in a variety of ways. The response may include the (production of protein synthesis), activation or deactivation of enzymes, alteration in the permeability of the cell membrane, and stimulation of the secretion of products. etc
