First we have to understand that a food chain is a series of steps in which organisms transfer energy by eating and being eaten. A food web is a feeding relationship among the various organisms in an ecosystem that forms a network of complex interactions. A food web links all the food chains in an ecosystem.
Answer: Grass, Grasshopper, Snake, Hawk.
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Answer:
Lesson 3: Movement of Energy in Ecosystems
Explanation:
1. B. grass,grasshopper,snake hawk
2. D. eliminated as heat
3. C. river
4. A. Biomass at the fourth trophic level is approximately ten times smaller than biomass at the trophic level.
b. hilly so that you can improve your cardiovascular endurance.
c. smooth and soft so that it can cushion the stresses of running.
d. uneven so that the tendons and ligaments in the ankles and knees are strengthened.
Answer:
An exoskeleton.
Explanation:
Tough outer shell of many insects is known as exoskeleton that represents an external skeleton. The exoskeleton provides protection and support to the insects body as they lack an internal skeletal system as higher organisms. In insects, it is made up of chitin.
Exoskeleton also plays role in sensing, feeding, excretion, and protection against desiccation in land insects.
Thus, the correct word to be filled in the blank is 'exoskeleton.'
Mus musculus (mouse)| size 2,500 million bases| gene # -30,000| gene density 1 gene per 100,000 bases| chromosome #40
Drosophila melanogaster (fruit fly)| size 180 million bases| gene # 13,600| gene density 1 gene per 9,000 bases| chromosome #8
Arabidopsis thaliana (plant)| size 125 million bases| gene #25,500| gene density 1 gene per 4,000 bases| chromosome #10
Caenorhabditis elegans (roundworm)| size 97 million bases| gene #19,100| gene density 1 gene per 5,000 bases| chromosome #12
Saccharomyces cerevisiae (yeast)| size 12 million bases| gene #6,300| gene density 1 gene per 2,000 bases| chromsome #32
Escherichia coli (bacteria)| size 4.7 million bases| gene #3,200| gene density 1 gene per 1,400 bases| chromosome #1
H. influenzae (bacteria)| size 1.8 million bases| gene #1,700| gene density 1 gene per 1,000 bases| chromsome #1
The table shows the relative size of the genomes, number of genes, and number of chromosomes for a variety of different organisms. Based on what we know regarding the genetic code of all living things, how does the genetic code of a eukaryote organism compare to that of a prokaryote organism?
A) Prokaryote organisms have much simpler DNA, containing fewer than four nitrogen bases.
B) Eukaryote organisms have a larger genome containing a more complex set of nitrogen bases.
C) Both types of organisms contain exactly the same four nitrogen bases, but in different sequences and numbers.
D) Both types of organisms contain exactly the same four nitrogen bases, in the exact sequences, but in varying numbers.
From the information provided here, it can be said that both the types of organisms contain exactly the same four nitrogen bases, but in different sequences and numbers. Thu, the correct option is C.
The genetic code is a set of rules which defines how the four-letter code of the DNA is translated into the 20-letter code of amino acids in an organism, which are the building blocks of proteins in that organism.
The genetic code is almost completely universal across all the different life forms, with a few minor differences in some of the bacteria such as Mycoplasma and in the bacterial-derived lineages such as mammalian mitochondria and chloroplast of plant cells. The variation is due to the codon usage.
The genetic code consists of the sequence of bases in the DNA or RNA molecules. Groups of three bases form codons, and each codon in this stands for one amino acid. The codons are read in the sequence following the start codon until a stop codon is reached in that sequence. The genetic code is universal, unambiguous, and redundant.
Therefore, the correct option is C.
Learn more about Genetic code here:
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