•move
•maintain homeostasis
•require and use energy
•respond to stimuli
•reproduce
•grow and develop
•display organization
•made up of one or more cells
Answer: No
Explanation: Usually a mother and baby's blood do not mix while the baby is in the womb. The mother's blood runs alongside the placenta, and the nutrients needed by the baby are absorbed and transferred to him/her.
DNA replication or duplication is the process of making copies of DNA by the cell. It involves a series of steps and various enzymes required for the completion of the process.
<h3>What is the process of DNA replication?</h3>
DNA replication has several steps along with some proteins called replication enzymes as well as RNA.
The process of replication is as follows:
- Replication fork: It is made by unzipping DNA into two strands. It is done by break of the purine and pyrimidine bond accomplished by an enzyme called DNA helicase.
- Primer binding: After this unzipping, a short piece of RNA which is called as a primer binds to the 3' end of the DNA strand. The primer bound is the starting point for replication. Primers are generated by the enzyme referred to as DNA primase.
- Elongation: DNA polymerase aids in the elongation process in DNA replication. As the replication moves in the 5' to 3' direction on the leading strand, the newly formed strand will be continuous. But in the case of the lagging strand replication starts by binding with multiple primers which involve DNA polymerase and then adds pieces of DNA, called Okazaki fragments, to the strand between primers.
- Termination: On the formation of both the strands, Exonuclease removes all RNA primers followed by proofreading and then the adhesion of the Okazaki fragments by enzyme DNA ligase.
Thus, these were the steps involved in the process of DNA replication.
For more details regarding DNA replication, visit:
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A grasshopper population in a prairie is limited in large part by the number of birds in the region. Following a terrible storm that killed many of the birds, the grasshopper population exhibits exponential growth. This happens because the grasshoppers experienced a steady __________ but decreased ______________
Answer:
Biotic potential; environmental resistance
Explanation:
Biotic potential is the ability of a species to be able to reproduce, grow and thrive well in a particular environment, especially under favorable environmental conditions such as, absence of predators, availability of food, no competition etc.
Environmental resistance can be referred to as the sum total of all biotic and abiotic factors that act against the biotic potential of a species and limits the multiplication and growth of that species in an environment.
The death of the birds that prey on the grasshopper population in prairie created an ideal environmental condition for the grasshopper to multiply, which is one of the primary factors that increases the biotic potential of the grasshopper as environmental resistance decreases.
