Answer:
1- Presence of phenotypic variation
2- some phenotypic variation due to genetic variation
3- the given trait has an impact on fitness
Explanation:
The evolutionary theory by natural selection proposed by Darwin in his publication “On the origin of species” (1859) is based on a series of assumptions that enable to understand the amazing biodiversity on the Earth. First, individuals are not identical among them, i.e., there exists variation in the traits among the members of a given population, species, etc. Second, phenotypic variation leads to differential survival and reproduction of the organisms that are best fitted to the environment (i.e., competence among the members of the population). Finally, phenotypic traits are passed from generation to generation (i.e., phenotypic variation is inheritable), thereby favoring offspring from parents more adapted to the environment.
Answer:
The special cells of the sponge include those that filter sea water; cells that are phagocytic (that engulf and digest food particles); those that form the external 'skin', breathing pores and tubes through which water enters and leaves the body; and those that secrete the mineral and organic skeletons, called spicules and fibres, respectively. Sponges are also unique because nearly all their cells can change function as required (totipotency).
Explanation:
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160g of O₂ will be required to fully react with 150g of glucose when glucose is broken down in our bodies to produce carbon dioxide and water.
The breakdown of glucose in our bodies can be represented by the following reaction:
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(g)
As shown in the reaction, a mole of glucose reacts with 6 moles of oxygen.
To calculate the molecular mass:
1 mole of glucose (C₆H₁₂O₆) = (6x12) + (12x1) + (6x16) = 180g
6 moles of oxygen= 6x (2x16) = 192g
180g of glucose reacts with 192g of oxygen. So, to calculate the amount of oxygen required to fully react with 150g of glucose=
150 x 192/180 = 160g of oxygen.
Therefore, 160g of oxygen is required to fully react with 150g of glucose.
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For bones to function, they need muscles and for muscles to function, they need bones.
Tides are caused by the pull of the moon and position of the earth. High tide is when the moon is further away from the earth and low tide is when the moon is closer to the earth since the water is being pulled in by the moon.
