Biology, 11.12.2019 22:31 zachinartos1
Prokaryotes and eukaryotes share some mechanisms for controlling gene expression, but all of the following are uniquely used in eukaryotes except:
a. operons for coordinated gene expression
b. chromatin remodeling
c. rna processing
d. enhancers, silencers, cell-type specific factors
Answers: 2
Biology, 22.06.2019 01:30
Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.
Answers: 1
Biology, 22.06.2019 02:00
1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area
Answers: 2
Biology, 22.06.2019 04:30
With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite
Answers: 2
Biology, 22.06.2019 08:00
Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.
Answers: 1
Prokaryotes and eukaryotes share some mechanisms for controlling gene expression, but all of the fol...
Mathematics, 18.08.2020 18:01
Mathematics, 18.08.2020 18:01
Mathematics, 18.08.2020 18:01
Mathematics, 18.08.2020 18:01
Mathematics, 18.08.2020 18:01
English, 18.08.2020 18:01
History, 18.08.2020 18:01
Mathematics, 18.08.2020 18:01
English, 18.08.2020 18:01