~Gymnosperms have developed over the course of its evolution, structures that solved the main limitations present in the Pteridophytes in relation to sexual reproduction, and in the <span>terrestrial environment.
</span>~The organisms that have adapted fully to the terrestrial environment feature adaptations in body to retain water, thus avoiding <span>dehydration.
~ @</span> Pteridophytes:Vascular tissue: water and minerals & <span>organic
material.
</span>Vascular tissue: increasing efficiency in transport of water & mineral salts with increased plant growth.Dependence on water for fertilization with anterozoides <span>furniture.</span>
<u>Answer:</u>
<em>The movement of air in a hot air balloon makes it move up into the sky.
</em>
<u>Explanation:</u>
Convection takes place in fluids. Hot fluids are less dense than cold fluids and the difference in the densities determine the direction of flow of fluids. <em>Less dense fluid moves up and the denser fluid take its place. </em>
Thus hot air rises up and cold air fills its place. The hot air balloon contains burner which <em>pumps hot air into the balloon.</em>
Thus the air inside the balloon will be hotter than the air outside the balloon. <em>Thus the hot air rises up carrying the balloon forward.
</em>
Answer:
<h2>
certain genes being expressed in some cells and not in others</h2>
Explanation:
The DNA is present in every cell of the multicellular organism but that does not mean that every cell will perform the same function.
The function of the cell is decided during the cell differentiation phase the function of the cell is determined by the expression of specific genes. Expression of these genes controls the functions of the cell.
In the given question the differences in the structure and function of the brain and kidney arise due to different expression of genes in different cells.
Thus, the selected option is the correct answer.
Potential energy means it’s not moving It’s standing still, for example a dog sitting isn’t potential energy, but kinetic energy is moving around so a dog running would be kinetic energy
This is the called The Troposphere.
<em>Hope this helped! :)</em>
