First, it is necessary that this scientist decide on what point of the Cretaceous period he wants to study. Among several points he may want to study the evolution of microorganisms of that time, the life of a dinosaur species, or the evolution of dinosaurs, the flora that was established during this period, among others. This is the phase of the scientific method called Observation.
After that, he must enter the phase called "Elaboration of hypotheses" where he will raise questions about the point he decided to study. "How many flower species existed in that period?", "How many of these flowers can we observe today?" among others.
After that, he will enter the phase called "Experimentation", where he will establish a type of experiment and all the experimental factors and variables that will allow the hypotheses to be answered.
After the experiment he will collect the data that will be analyzed and that will give results that will answer the hypotheses previously established. This is the phase called "Analysis of the results".
At that moment, he will be able to reach the last phase of the scientific method, the phase called "conclusion", where he will show the conclusions that the experiment allowed to be established.
Answer:
negative, inhibition
Explanation:
The experiment in the illustration shows that early succession plants have a <u>negative </u>effect on the late succession plants, and the observation is most consistent with the <u>inhibition</u> model of succession.
<em>That the late succession plant thrives better in the absence of the early succession plants means that the early succession plant has been impacting the growth of the late succession plant negatively. This is consistent with the inhibition model of succession.</em>
There are 3 different models of succession. These include;
- Facilitation model in which colonists modify the environment to favor the growth of later successional species.
- Tolerance model in which early colonists' modification of the environment has no positive or negative impact on the growth of later successional species.
- Inhibition model in which early colonists modify the environment to inhibit the growth of later successional species.
Answer:
cell wall, cell membrane, cytoplasm, vacuole, ER and nucleous
Explanation:
Answer:
B) cAMP
Explanation:
Phosphodiesterase is an enzyme that breaks a phosphodiester bond, for example in molecules such as cAMP and cGMP. So, phosphodiestarases are are regulators of signal transduction: regulate the duration of signaling pathway.
Caffeine is central-nervous-system stimulant and the mechanisms of its action usually are: mobilization of intracellular calcium or inhibition of specific phosphodiesterases.
Answer: 23
Explanation:
After the completion of meiosis in humans, a diploid germ cell has produced cells with half the original chromosome number, generating 23 haploid nuclei.
Meiosis is cell division that reduces chromosome number by half. Hence, a diploid germ cell with 46 chromosomes (23 pairs) is halved to 23 nuclei at the end of meiosis, the 23 nuclei will be carried by the sex gamete
