Answer. They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers.
<u>Answer:</u>
The correct answer option is C. Annelids.
<u>Explanation:</u>
Annelids are the invertebrates that have segmented bodies.
The annelids or Phylum Annelida (also called ringed or segmented worms) are widely known for their characteristic of having segmented bodies.
These annelids contain largely segmented bodies with each segment having secondary subdivisions known as annuli which consists of elements of the different body systems which are essential for life, for instance the nervous system.
Answer:
Death I guess?
Sorry for wasting ur points, u can report this if u want
Answer:
In muscles contraction the correct order of the steps are: A (Nerve impulse reaches the muscle), B (Action potential travels down T-tubules), C (Calcium binds to troponin), D (Tropomyosin moves).
Explanation:
Skeletal muscle contractions are based on different physiological and biochemical phenomena that happen in every cell. These phenomena are due to stimulation produced by somatic motor neurons, which axons get in contact with muscle fibers through a neuromuscular synapse. In rest, attraction strengths between myosin and actin filaments are inhibited by the tropomyosin. When an action potential is originated in the central nervous system, it travels to the somatic motor neuron membrane: the muscle fiber, and activates the calcium channels releasing it in the neuron. Calcium makes vesicles to fuse with the membrane and release the neurotransmitter named acetylcholine (Ach) into the synaptic space in the juncture. Then, Ach binds to its receptors on the skeletal muscle fiber. This causes the ion channels to open, and positively charged sodium ions cross the membrane to get into the muscle fiber (sarcoplasm) and potassium get out. The difference in charges caused by the migration of sodium and potassium makes the muscle fiber membrane to become more positively charged (depolarized). The action potential caused by this depolarization enters the t-tubules depolarizing the inner portion of the muscle fiber. This activates calcium channels in the T tubules membrane, that make the calcium be released into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to the troponin C, the troponin T alters the tropomyosin by moving it and then unblocks the binding sites. Myosin binds to the uncovered actin-binding sites, and while doing it ATP is transformed into ADP and inorganic phosphate. Z-bands are then pulled toward each other, thus shortening the sarcomere and the I-band, and producing muscle fiber contraction.
Answer:
If you want to improve the amount of the recycling in your city, Tom need to implement a lot of initiatives and the following on this question isn't the right way to do it.
Explanation:
Whether Tom wants to improve the amount of recycling in his city, he need not to ban all plastics. What he must to do is to take plastics from houses, companies, supermarkets and other places that use this kind of material and recycle them, and change them in other products to back to the society or community. Besides recycle, he need to contact the local authority to make recycling campaigns. That's the reason to close grocery stores on Sundays isn't the right way to do in this situation. If he are wishing to close all landfills, isn't the right option to do, because you have to implement a good landfills and make it works in a right way, because is important to have an sustainable landfill without creating environmental pollution for the community, local population and the planet. But to do all of these things explained above, you have to obtain investiment and money throughout the authorities, governments or maybe businessmen from big companies.
