BIOLOGY HIGH SCHOOL

Which of the following are tenets of the cell theorya. cells are the building blocks of life

b. cells all arise from pre existing cells

c. cells are the basic living units of structure an function

d. all of above

Answers

Answer 1
Answer: out of all the choises 
a. cells are the building blocks of life

b. cells all arise from pre existing cells

c. cells are the basic living units of structure an function 

d. all of above
it would be d
Answer 2
Answer:

Answer: D

Explanation: I Got it right

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Which of the following statements is true?A. A technological society has no impact on the environment
B. A technological society has a completely positive impact on the environment
C. A technological society has both a positive and negative impact on the environment
D. A technological society has a completely negative impact on the environment

Answers

C.A technological society has both a positive and negative impact of the environment

Answer:

C.A technological society has both a positive and negative impact of the environment

Explanation:

The cells that are on each side of a stomata and open and close it like a mouth are called _____. guard cells meristem cells parenchyma cells collenchyma cells

Answers

The cells that are on each side of the stomatal pore and open and closeit like a mouth is called guard cells. Guard cells are found almost allover the body part of the plant. The opening and closing of the stomata acts asa mediator by changes in turgor pressure of the guard cells. Turgor pressurepushes and sometimes out of the cell wall of the plant to allow ions ofsolution to come in and out. The stomatal pore of the guard cell becomes largewhen water is present around it and it is small when water is not present. 

Answer:

The cells that are on each side of a stomata and open and close it like a mouth are called guard cells.

1.Which of the following will occasionally produce a duplicate gene? A-chromosome replication during mitosis B-Crossing-over during meiosis C-neutral mutation during Transcription D-genetic drift during reproduction

Answers

Homologous chromosomes exchange DNA during meiosis in a process called crossing-over. Crossing-over sometimes involves an unequal swapping of DNA. Therefore the answer is B.  

The answer is crossing over, or B

explain the importance of the cytological markers (the translocated segment and the chromosome knob) in the creighton and mcclintock's experiment.

Answers

Answer:

Explanation: Cytological markers such as the translocated segment and the chromosome knob play a crucial role in various biological research and applied sciences. These markers have proven to be invaluable tools for understanding genetic diversity, evolution, and gene mapping in organisms. The translocated segment, which is an exchange of genetic material between nonhomologous chromosomes, can provide insights into evolutionary relationships between species. By studying translocations, scientists can determine how different species are related and how genetic material has been exchanged or rearranged during evolution. On the other hand, the chromosome knob is a distinguishing structure found on certain chromosomes that serves as a reliable cytological marker for gene mapping and breeding programs. It facilitates the identification of specific genes associated with particular traits or diseases through cytogenetic techniques. Moreover, these cytological markers enable researchers to develop breeding strategies that aim at improving crops' yield, disease resistance, or other desirable qualities by precisely transferring particular chromosomal segments or genes identified by the presence of knobs and translocations. Hence, understanding the significance of cytological markers is vital for both basic scientific discoveries and practical applications in agriculture and medicine.

While studying enzyme kinetics in the lab, a scientist observed that the rate of a reaction involvingenzyme amylase increased as the concentration of starch increased. With further increase in starchconcentration, the amylase activity did not change. Why did this happen

Answers

  B. This is because there were still active sites available for the starch substrate to bind to when the concentration was initially increased (the reaction will have been first order with respect to the concentration of starch). However, at a certain concentration, all the active sites of the enzymes will be full so there will be no active sites available for the starch molecules to bind to (the reaction is now zero order with respect to the concentration of starch). i need brainliest answer to rank up plzzzz help

5. Why are fingerprints stronger individual evidence than nDNA?​

Answers

Compared to fingerprint evidence alone, DNA was far more likely to lead to suspects and result in arrests. In crime scenes where biological evidence was collected and tested, DNA evidence was five times more likely than fingerprints to yield a suspect and nine times more likely to lead to an arrest.
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