First, you need to know that 1 mm = 1000 μm. So when the red blood cell is drawn 100 times larger than its actual size, the drawn size is 8 * 100 = 800 μm = 0.8 mm. So the right answer is B.
Answer:
Metaphase.
Explanation:
Metaphase may be defined as the stage of the cell cycle followed after the prophase and before the anaphase. The chromosomes are joined together with the centromere.
This stage can easily be identified in the microscope. The chromosomes are aligned themselves at metaphasal plate in the center of the cell.
Thus, the answer is metaphase.
Answer:
Reinforcement
Explanation:
Reinforcement can be referred to as anything that can be used to increase, enhance or strengthen a desirable behavior in a person or an organism. Reinforcement is of two types, they include positive reinforcement and negative reinforcement. Positive reinforcement has to do with adding a reward in order to enhance a desirable behavior, while negative reinforcement has to do with removing an undesirable thing in order to strengthen a desirable behavior.
From the question asked, because the presence of insects after moving the decaying logs increased the frequency at which the bears moved the decaying logs, the finding of the insects is, therefore, a reinforcement. The finding of the enhanced or strengthened the desirable behavior.
Answer:
C. A chlorine breaks off and forms a free radical
Explanation:
When CFCs are exposed to high levels of UV radiation in the atmosphere, the CFC molecule breaks into chlorine and forms free radicals.
These free chlorine radicals then reacts with ozone molecules and breaks the ozone atom (O3) to form chlorine monoxide and oxygen (O2) molecule.
CFCs are main cause of ozone depletion in the atmosphere.
Hence, the correct option is "C".
Answer:
The proper matching is given below.
Explanation:
Predation Typical plant defence include(thorns,sticky substances) and chemicals(toxin,bad tastingchemicals) adaptation.
Competition When individuals fight for a common resource,the weaker one experience loss or affected adversely.
Disease pathogens can be transmitted to host by direct contact between hosts o through soil,water,air or any other surface.
Symbiosis This interaction is of three types : mutalism,Commensalism and parasitism.
