Answer : B. equal birth and death rates.
Explanation : If people are being born and dying at a 1:1 rate then the population would not fluctuate because there would not be a increase or decrease in population.
Answer: The advantages of spines in these unrelated organisms are as follows:
- for escape and defence
- for regulations of body temperature
- for conservation of water
Explanation:
The evolution of spines in Tenrecs, echidnas and hedgehogs represent STRUCTURAL ADAPTATION i.e when a part of the body of a living organism undergoes changes to become structurally adapted to its mode of life.
- The evolved spines in hedgehogs are for physical defence
- in tenrecs, they are for physical defense
Answer:
skeletnog
Explanation:
El tórax es la parte superior del tronco que se encuentra entre el cuello (collum) y abdomen. Lla aleta pectoral tiene la forma de una pila con flecos de ropa aplastada al revés. En la cavidad del cabello torácico (eavitas thoracis) se encuentran los órganos vitales: el corazón y los pulmones.
Los huesos de las paredes del esternón son: el esternón, las costillas y las vértebras torácicas.
Answer:
When a future offspring has just been conceived it has the highest level of potency in Totipotency.
Explanation:
Potency is the ability of cells to differentiate. AT different stages of development the level of potency changes. The highest level of potency is Totipotency and these cells have the ability to develop a whole organism. The common examples are spores and zygote. In embryonic stage the cells are Pluripotent and they can differentiate into different type of cells. Pluripotent cells after further development changes into Multipotent cells. Unipotent cells have the least potency and can develop only in one cell linage.
Sam and Jenny ride their bikes at a constant velocity of 3 miles per hour.
Explanation:
Here we see that both of them are moving at a constant velocity which means their speed is constant and they are moving in a straight line.
Zero acceleration is implied on the bikes and the net force is BALANCED.
When forces are in balance, acceleration is zero. Velocity is constant and there is no net or unbalanced force.
