One
substance, other than the secretions from nerve cells, that is used in cell
communication are hormones.
<span>
To
add, <span>a hormone is any member of a class of signaling
molecules produced by glands in multicellular organisms that are transported by
the circulatory system to target distant organs to regulate physiology and
behaviour.</span></span>
Deposition by the river replenishes soil in the wetlands with sediment and nutrients illustrates a positive effect that the Nueces River has on the wetlands.
Option: C
Explanation:
A river in its lower course leave the high elevated area and enters into the flat land. In the lower course of the river deposition is the prime work of a river. Estuary, delta are some of the landform that formed in the lower course of a river. Here, Nueces estuary is formed where Nueces river enters into the gulf.
In this gulf a wetland is formed which supports aquatic life and a dwelling place for them and land species also. Here, river deposits all its sediments and replenish the soil of wetland with new sediments and nutrients.
Cell walls are thicker than cell membranes, and can therefore support the cell well. They keep a strong boundary for the protection of the cell, but can let water and some nutrients through to nourish and power the cell. Hope this helps! :)
Answer:
Telomeres cap and protect the ends of chromosomes from degradation and illegitimate recombination. ... Abolition of telomerase activity in such cells nevertheless results in telomere shortening, a process that eventually destabilizes the ends of chromosomes, leading to genomic instability and cell growth arrest or death.
Image and options are not provided in the question, the image is attached below and the complete question is as following:
Study the image. Which best describes what the picture shows? an organism a community:
A. an organism
B. a community
C. a niche
D. a population
Answer:
D. a population
Explanation:
Biological organization is defined as a hierarchy of complex biological structures and systems on the basis of several related philosophical ideas.
It shows the arrangment of organism or biological structures from simplest form to complex, it includes atom, molecule, organelle, tissues, cells, organ systems, organisms, populations, communities, ecosystem, and biosphere (not arranged in sequential manner).
The given picture is related to a population because it shows groups of organisms of the same species, that is rats.
Hence, the correct option is D.
