Answer:
Despite a substantial literature using life cycle assessment (LCA) approach, the extent to which second and third generation biofuels are more sustainable than the first generation remains a subject of debate. Although the existence of limitations due to LCA variability and uncertainty, this paper intends to determine global tendencies based on a statistic and critical interpretation of previously published study results, reviewing 61 recent papers addressing an environmental evaluation of microalgae biofuels. Such information is compared to the same impact indicators for fossil fuels and for ethanol and biodiesel from terrestrial crops in Europe and Brazil. For each case, the system boundaries and the methodological choices were precisely described. The sustainability potential of all biofuels was evaluated by the Global Warming Potential (GWP), the Energy Ratio (ER) and the Land Use (LU), allowing a broad estimation of the biofuels’ contribution to climate change mitigation, their net energy efficiency and their competiveness with food production chain.
Explanation:
Answer:
C) homologous; analogous
Explanation:
The relationship between of the bones in the forelimbs of penguins and seals is a homology.
Homology is the shared ancestry between a pair of structures - in this case the forelimbs- in different taxa - in this case penguins and seals-. The forelimbs of vertebrates is a common example of homologous structures because they derived from the same ancestral tetrapod structure.
On the other hand, the relationship between the pinguins flippers and the seals flippers is an analogy.
Structures of two different organisms with similar functionsare analogus if they are similar in function - in this case for swimming- due to convergent evolution but not due to common ancestry. Pinguins flippers and seals flippers have similar function but different ancestry, therefore they are analogous structures.
Which chamber experiences a maximum pressure of around 118 mm hg during contraction?
The answer is - left ventricle
There are four chambers of the heart and the left ventricle is one of them and this is located in the bottom left portion of the heart just below the left atrium. When the heart contracts, the blood flows back into the left atrium and enters the left ventricle through mitral valve.
The DNA structure can be a twisted ladder. The image above shows what is referred to as this structure's double-helix shape. It is a nucleic acid, and nucleotides are the building blocks of all nucleic acids. Each nucleotide, which makes up a portion of the DNA molecule, is made up of three separate substances, including sugar, phosphate groups, and nitrogen bases.
Nucleotides, which consist of a sugar group, a phosphate group, and a nitrogen base, are the fundamental components of DNA. Each DNA strand is made up of nucleotides that are joined by the sugar and phosphate groups. There are four distinct categories of nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). The pairings of these four nitrogenous bases are as follows: A with T and C with G. The DNA's double helix structure, which resembles a twisted ladder, depends on these base pairs. The genetic code or DNA's instructions are determined by the nitrogenous bases' order.
Sugar is one of the three structural elements of DNA that form the DNA molecule's backbone. Additionally known as deoxyribose. A ladder-like structure is created when the nitrogenous bases of the opposing strands establish hydrogen bonds. DNA backbone structure See in the figure.
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D. Vascular tissue
Vascular tissue is known to be a complex conducting tissue that is formed by the arrangement of multiple cell types in vascular plants. Thus, the transportation of minerals, water and other products of photosynthesis occurred through the vascular tissue which is transported throughout the plant. However, both xylem and phloem are primary component of vascular tissue.
