The table below shows the distances from earth to several different objects in the universe.  distances are shown in light years (ly).

objectdistance from earth (ly)alpha centauri a (star)4.4andromeda (galaxy)2.5 millionbetelgeuse (star)640

it would take about 77  million  years for the fastest human-made spacecraft to reach alpha centauri a. about how long would it take such a spacecraft to reach the andromeda galaxy?

  a. 

many trillions of years

  b. 

2.5 million years

  c. 

64.0 million years

  d. 

a few thousand years

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

idk why hjggjhjkhj

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.