Which of the following is a difference between food chains and food webs?Food webs contain both plants and animals, but food chains contain only plants.

Food webs separate organisms by trophic level, but food chains do not.

Food chains show energy flow in an ecosystem, and food webs do not.

Food chains are linear, while food webs are complex.

Answers

Answer 1

Answer:

Answer:

Option D, Food chains are linear, while food webs are complex.

Explanation:

A food chain is a linear organization in which the producer lies at the first stage followed by consumer organisms lying at primary, secondary and tertiary stages of food chain.

While in a food web, there can be several interlinked food chains or there can be an organism within the food web which is part of several food chains at an instance. Hence, the linearity of organization cannot be retained in case of food web thereby making it more complex than the food chain.

Hence, option D is correct.

Answer 2

Answer: Both food chains and food webs contain plants and animals so it is not A.

Food chains separate by trophic level not food webs so it is not B

***Food chains show energy flow by each trophic level and food webs do not therefore it is C***

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The ___ is also known as the age of fishes.a. Cambrian
b. Devonian
c. Permian
d. Vendian

Answers

The answer is Devonian.
Devonian is also known as the age of fishes.Devonian is named after the word Devon, a country somewhere south western England. This age of fishes began the domination of the fishes.

The first step to begin digestion of food starts with the _____A : mouth

B : Stomach

C : Esophagus

Answers

mouth its mechanical digestion the ripping and tearing of food

The first step begins with: A. the mouth.

Which of the following is an example of recycling a renewable resource? A. riding a bike instead of driving a car B. turning food scraps into compost for plants C. turning off lights when you are not using them D. washing plastic forks and using them again instead of throwing them away

Answers

Answer: C. Turning food scraps into compost for plants.

Explanation:

A renewable resource is the one which can be resued once used. On earth the renewable resources are abundantly available like sunlight, water, and air. Recycling of renewable resource can be define as the reuse of resource or conversion of resource into another form so that it can be used again.

A food trash can be coverted into a compost which can be a valuable recycling product useful for the growth of the plants.

What causes continental lithosphere to become thinner and weaken?

Answers

Continental litosphere is made of relatively light weight minerals. It has a low density. Oceanic litosphetre is composed of a heavier minerals. Tensions and heat flow in the asthenosphere( beneath the litosphere) waekens the floating solid plate causing it to break apart. Thinning of the continental litosphere is result of hydration weakening. It is a special consequence of plate tectonics. By hydration weakening the basal portions of litosphere can be transformed into convecting asthenosphere.

Suppose that a dominant allele (P) codes for a polka-dot tail and a recessive allele (p) codes for a solid colored tail. If two heterozygous individuals with polka-dot tails mate, what's the probability of the phenotype and genotype combinations of the offspring?A. 25 percent chance of a polka-dot tail and 75 percent chance of a solid colored tail (25 percent PP; 50 percent Pp; 25 percent pp)
B. 75 percent chance of a polka-dot tail and 25 percent chance of a solid colored tail (25 percent PP; 50 percent Pp; 25 percent pp)
C. 75 percent chance of a polka-dot tail and 25 percent chance of a solid colored tail (75 percent Pp; 25 percent pp)
D. 50 percent chance of a polka-dot tail and 50 percent chance of a solid colored tail (50 percent PP; 50 percent pp)

Answers

The answer is B. 75 percent chance of a polka-dot tail and 25 percent chance of a solid colored tail (25 percent PP; 50 percent Pp; 25 percent pp)

If P represents dominant allele (a polka-dot tail), p represents recessive allele (a solid colored tail), then heterozygous individuals have Pp genotype. All alleles will combine each other:

Parental generation: Pp x Pp
Offspring: PP Pp Pp pp

Thus, the probability of PP genotype is 1/4 (there is only 1 of total 4 possible genotypes), which is 25%. The probability of Pp genotype is 1/2 or 50%, and the probability of pp genotype is 1/2 or 25%.

Talking of phenotypes, the P allele is dominant and each genotype containing P allele will have the polka-dot phenotype. In this case, there are 3 out of 4 genotypes containing P allele - 1 PP and 2 Pp. So, the probability of the polka-dot tail is 3/4 or 75%, leaving the probability of the solid color tail 1/4 or 25%.

Which trilobite characteristic did not change through time?

Answers

The answer is a presence of three lobes.

The name trilobite means three lobes. Their body is divided into three lobes - a central axial and two pleural lobes. This characteristic did not change through time and it can be found between all fossils. But, some changes are noticed regarding the eyes size, shape, and position, suture position, as well as a number of body segments and spine.

number of spines

Explanation:

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