Answer:
Bottom -up models of community:
The bottom up models of the community represents the unidirectional influence of the community. The model shows from the lower to the higher tropic levels in the community. This model determines the nutrient minerals and the primary producer abundance.
Top - down models of community :
The top down model of the community represents the one tropic level to the other tropic levels. This model is also known as cascade model. This model determines how the one tropic level controls the other tropic level. For example: the control of herbivores by the predators.
Answer:
The correct option is C, SCANNING ELECTRON MICROSCOPE.
Explanation:
The options attached to this question are as follows:
A.a classroom compound microscope
B.a transmission electron microscope
C.a scanning electron microscope
D.a scanning tunneling microscope.
Scanning electron microscope is a form of electron microscope that has the capacity to produced the image of a viewed substance by scanning the surface of the sample with a strong beam of focused electrons. The microscope is typically used to obtain information about the surface structure and composition of solid substances.
Answer:
A,B and AB
Explanation:
Firstly homozygous are dominant in RR
Then heterogeneous are recessive in r
IF
RR breeds with rr
RR. Rr
f1 generation=Rr
Then
f1 crossing
Rr. and. Rr
f2 generation= RR,Rr,rr
Answer:
Antibiotic resistance continues to become worse, despite the ever-increasing resources devoted to combat the problem. One of the most important factors in the development of resistance to antibiotics is the remarkable ability of bacteria to share genetic resources via Lateral Gene Transfer (LGT).
LGT occurs on a global scale, such that in theory, any gene in any organism anywhere in the microbial biosphere might be mobilized and spread. With sufficiently strong selection, any gene may spread to a point where it establishes a global presence. From an antibiotic resistance perspective, this means that a resistance phenotype can appear in a diverse range of infections around the globe nearly simultaneously. We discuss the forces and agents that make this LGT possible and argue that the problem of resistance can ultimately only be managed by understanding the problem from a broad ecological and evolutionary perspective. We also argue that human activities are exacerbating the problem by increasing the tempo of LGT and bacterial evolution for many traits that are important to humans.
Answer:
I would say it's pectin secondary cell, but don't trust my word
