Answer:
The ozone layer's status today
And at the end of 2018, the United Nations confirmed in a scientific assessment that the ozone layer is recovering, projecting that it would heal completely in the (non-polar) Northern Hemisphere by the 2030s, followed by the Southern Hemisphere in the 2050s and polar regions by 2060.
Answer:
All dicot seeds have an endosperm that is produced during seed development.
Explanation:
Answer:
1. Signaling molecule
2. Signaling receptors
Explanation:
Hormones, growth factors, neurotransmitters, etc. serve the function of signaling molecules for cells. These molecules are released by one cell and bind to the receptors present on/in the target cells to elicit the desired response. Thereby, the signaling molecules serve in cell-cell communication.
For example, insulin hormone synthesized and released from beta cells of pancreas binds to its cell surface receptors present on the surfaces of liver cells and muscle cells to stimulate the uptake of the glucose from the blood.
Likewise, neurotransmitters released from the presynaptic neuron bind to receptors present on the membrane of postsynaptic neuron and serve to carry the nerve impulse to the postsynaptic neuron.
Answer:
b) 0
Explanation:
Given that:
Emigration = 3, Immigration = 17, Birth = 12, and Mortality = 26
Net effect on the population, which is the change in population, can be calculated using the formula (Births + Immigration) - (Mortality + Emigration)
Therefore, Net effect = (12 + 17) - (26 + 3)
= 29 – 29
= 0
The net effect on the population is 0. There is no increase or decrease in the total population
<span>A proton is positive, Its in the center of the atom, electrons are on the outer orbits of the atom.</span>