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3 years ago

How does water temperature affect bullfrog behavior

1 answer:

3 0

the relevant controlled variable is the frog's body temperature, heart rate, breathing rate, and blood pressure. The controlled is a neutral pH level of 7 for the water that the frog is placed in, so that it does not obscure the effects of the water temperature on the frog's physiological factors.

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Which statement best describes the difference between a gene and an allele?

Nesterboy [21]

"A section of DNA that usually contains the code for a specific protein that determines a specific trait is a gene, while an allele is a section of a gene" is the statement that best describes the difference between a gene and an allele. The correct option among all the options given in the question is option "A".

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3 years ago

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Fish that feed on sediment will most likely be found in _______ rivers. a. shallow b. narrow c. deep d. fast-moving

daser333 [38]

Answer:

The correct answer is - option C. Deep.

Explanation:

The river with a narrow river channel found in shallow depth rivers that show relatively faster water flows than the deeper river that are slow in the water flow. In the shallow rivers sediments found in suspended mode and transported to the sea or delta and deposited there.

In deeper rivers, the sediments found deposited in the rivers which is helpful for the fishes for their nutrients as they feed on these sediments.

Thus, the correct answer is- option (C).

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3 years ago

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Ecologists survey the tree species in two forest plots. plot 1 has six different species, and 95 percent of all trees belong to

Kitty [74]

In this case, the plot 1 is very rich in the single species; it is dominated by a particular species, which occupy 95% share. While in the plot 2 are rich in the number of species, it has 5 species occupying 20% share.

In comparative analysis, it is seen the plot 1 is rich in species, but diversity is very less. While, plot 2 is rich in the diversity of species, as 5 different species are present, but it is not rich in a particular species.

Hence, compared with plot 1, plot 2 has greater species diversity and lower species richness.

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3 years ago

Dallas, Texas had an outbreak of West Nile virus, a virus spread by mosquitos, in 2012. In 2012, the mosquito population increas

astraxan [27]

Answer:

1: Organisms that make energy are called producers.

Producers are the autotrophic or chemotrophic organisms which are capable of synthesizing their food either by photosynthesis or by chemosynthesis. In the process of photosynthesis organisms use sunlight as a source of energy to convert water and carbon dioxide into carbohydrates and oxygen. Also some simple organisms use chemical energy obtained by chemical inorganic substances and convert them as organic chemical substances to obtain them as food.

2: A decomposer recycles matter back into the food web and biogeochemical cycles.

A decomposer is an organic which feed upon dead decaying organic matter generated after the death of plants and animals. This process results in the simplification of organic matter into simpler substances which are again absorbed by the plants through soil.

3. The sun is the source of energy. The light energy from sun is converted into chemical energy in the form of food by the producers like plants.

4. The autotrophs are found at the base of a food pyramid.

The autotrophs are called as producers because they are capable of synthesizing their own food by the process of photosynthesis . The diversity of producers in nature is more as compared to other organisms therefore, it lies at the base of the food chain.

Explanation:

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3 years ago

in eukaryotes, genetic material is packaged in the nucleus. which group accurately lists the levels of the packaging in order of

vredina [299]

The DNA molecules are often fitted into the nucleus through packaging into a compressed and compact structure. The group that accurately lists the levels of the packaging in order of increasing size are nucleotide, DNA duplex, nucleosome, chromatin, chromosome.

Chromosomal DNA is often packaged into a nuclei that is microscopic in nature through the help of histones.

In the DNA packaging inside the nucleus, the cells folds or wrap their DNA strands around scaffolding proteins to form a coiled condensed structure. The structure is known as chromatin.

The full question is below

Which one of the following MOST accurately lists the components in order of increasing size?

A. chromosome, chromatin, nucleosome, DNA duplex, nucleotide

B. nucleotide, DNA duplex, nucleosome, chromatin, chromosome

C. nucleotide, DNA duplex, chromatin, nucleosome, chromosome

D. nucleotide, nucleosome, DNA duplex, chromatin, chromosome

E. chromosome, nucleosome, chromatin, DNA duplex, nucleotide

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3 years ago