BIOLOGY HIGH SCHOOL

Describe an ecosystem and identify the different trophic levels.

Answers

Answer 1
Answer: An ecosystem is a closed system consisting of living and non-living things.

Trophic Level 1: Primary Producer
Trophic Level 2: Primary Consumer
Trophic Level 3: Secondary Consumer
Trophic Level 4: Tertiary Consumer

Related Questions

Which of the following could result in secondary succession?a. the formation of a tall sand dune on a previously grassy beach b. a vast glacier in motion forming a U-shaped valley on its wake c. a volcanic eruption that covers most of what used to be a forest d. an introduced species that devastates native plants as it feeds
15. Unlike a lytic infection, a lysogenic infection
The rate of primary productivity is equal to the rate of secondary productivity.a. Trueb. False
Usually, it is observed that climates in coastal regions are moderate as compared to climates in the interiors of continents. Why is this so?
Snapdragons, a flowering plant popular with gardeners, can have red, white, and pink colored petals. When snapdragons with red petals (RR) are crossed with snapdragons having white (rr) petals, the offspring have pink petals. The pink coloration (Rr) is a phenotype in between the red and white parental phenotypes. What is this kind of inheritance pattern called?

The symbiotic relationship between a flower and the insect that feeds on its nectar is an example ofa. mutualism because the flower provides the insect with food and the insect pollinates the flower.
b. parasitism because the insect lives off the nectar from the flower.
c. commensalism because the insect does not harm the flower and the flower does not benefit from the relationship.
d. predation because the insect feeds on the flower.

Answers

The answer is A. Mutualism. Both the flower and the insect benefit from the relationship; the flower is pollinated and the bee gets nectar.

After school, Kai feels hungry and tired. He finds some sugar cookies in the cabinet and finishes the whole package.Which statements best describe the role of glucagon and insulin in this scenario?
O Glucagon was secreted by his pancreas before he ate the cookies because his blood glucose was low. Insulin
was secreted after he ate the cookies because his blood glucose was high.
O Insulin was secreted by his pancreas before he ate the cookies because his blood glucose was low. Glucagon
was secreted after he ate the cookies because his blood glucose was high.
O Glucagon was secreted by his pancreas before he ate the cookies because his blood glucose was low. After he
ate, insulin from the cookies increased his blood sugar levels.
O Insulin was secreted by his pancreas before he ate the cookies because his blood glucose was low. After he ate,
glucagon from the cookies increased his blood sugar levels.

Answers

During  process of digestion which takes place in digestive tract statement which describes role of glucagon and insulin is glucagon was secreted by  pancreas before he ate the cookies because his blood glucose was low. Insulin was secreted after he ate cookies because his blood glucose was high.

What is digestive tract?

It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.

The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices from gastric glands in response to sight and smell of food.It involves chewing and chemical breakdown of food by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase and amylase which are secreted by the salivary and serous glands present on the tongue.

Learn more about digestive tract,here:

brainly.com/question/28163067

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Answer: Option A) Glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. Insulin was secreted after he ate the cookies because his blood glucose was high.

Explanation:When Kai was hungry and his blood glucose level was decreasing, glucagon is the hormone which was secreted by the islets of pancreas to increase the blood sugar levels in his body. Glucagon forces the liver to release the stored glucose in it, which increases the blood glucose level in the body. When Kai ate the sugar cookies there was enough of blood glucose available for his body, also it exceeded the requirement and went high. Insulin was then secreted to control this excess glucose from the islets of pancreas. As it helps the body cells to absorb the glucose and lowers the amount of glucose in the blood. It makes the cell available with the glucose to produce energy and perform their activities.

In short, glucagon and insulin both are secreted by the same organ which is islets of pancreas. But they differ in their function, glucagon increases the blood glucose when the body needs it, whereas insulin helps to absorb the excessive glucose and stores that in the body. Both are the hormones which help in regulating the body glucose levels.

Which location receives 12 hours of daylight and 12 hours of darkness on June 21?

Answers

Equator and Hawaii are most likely to see 12 hours of bothnight and day on June 21.

In a lysogenic infection, the viral dna that is embbeded in a host cell's dna is called a(n)

Answers

The correct answer is prophage. In a lysogenic infection, the viral DNA that is embedded in a host cell's DNA is called a prophage. Prophage is actually a bacteriophage genome that is being inserted into the circular bacterial DNA chromosome.

In the fall some farmers plow the remains of corn plants into the ground. this activity contributes most directly to the?1.increase in the biodiversity of there fields
2.depletion of nonrenewable resources
3.destruction of natural habitats
4. recycling of organic matter

Answers

The right answer for the question that is being asked and shown above is that: "1.increase in the biodiversity of there fields" In the fall some farmers plow the remains of corn plants into the ground. this activity contributes most directly to the 1.increase in the biodiversity of there fields

the answer is 1.  This is because when the remains are plowed into the ground, it helps the feild become more diverse in the use of crops.

Which of the following can be used to cut DNA so it can be studied?A. restriction enzymes

B. gel electrophoresis

C. karyotypes

D. haplotypes

Answers

Answer:

The correct answer is option A. restriction enzymes.

Explanation:

Restriction enzymes or restriction endonucleases are enzymes that identify a particular DNA sequence, knowns as restriction site, and cuts the DNA within or adjacent to restriction site.

Restriction enzymes also known as biological scissors because of their ability to cut DNA at a specific sequence.

EcoR I, isolated from the bacterium Escherichia coli, is a restriction enzyme that restricts DNA between the G and A on each strand in a particular DNA sequence.

Thus, The correct answer is option A. restriction enzymes.
answer is A. restriction enzyme 
In biology ,Restriction enzyme is known as a scissor.
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Fungi are classified based uponA. how they obtain food.B. their digestive structures.C. their cellular structures.D. how they reproduce.help;)))))))
A population of bacteria is treated with an antibiotic. It is estimated that 5,000 live bacteria existed in the sample before treatment. After each day of treatment, 40% of the sample remains alive. Which best describes the graph of the function that represents the number of live bacteria after x days of treatment?A. f(x) = 5000(0.4)x, with a horizontal asymptote of y = 0 B. f(x) = 5000(0.6)x, with a vertical asymptote of x = 0 C. f(x) = 5000(1.4)x, with a horizontal asymptote of y = 0 D. f(x) = 5000(1.6)x, with a vertical asymptote of x = 0