1. The primary source of energy in most ecosystems is/are
A. autotrophs

B. the sun

C. heterotrophs

D. glucose

2. Which would be an autotroph in a grassland ecosystem?
A. mallard duck

B. prairie cordgrass

C. monarch butterfly

D. muskrat

3. Which of the following best explains why there are fewer secondary consumers than producers?
A. Around 10% of the energy is transferred to support the next trophic level.

B. Heat energy given off from producers kills off primary and secondary consumers.

C. Secondary consumers have less cell processes that need energy.

D. More secondary consumers can absorb radiant energy from the sun.

4. Which tropic level ingests the most biomass in order to receive the energy they need?
A. primary consumers

B. producers

C. tertiary consumers

D. secondary consumers

5. Wolves were reintroduced to Yellowstone National Park in 1995. They began to hunt the abundant elk population, so elk numbers decreased. The elk carcasses provided food for other predators, like foxes, coyotes, and bears, so all of their populations increased. Elk used to overgraze on willow plants; now that willows are growing back, beaver numbers are increasing, because they prefer the slow-moving water that willows cause.
Which of these species is a keystone species?
A. willows

B. elk

C. bears

D. wolves​

Answers

Answer 1

Answer:

B. the sun

B. prairie cordgrass

A. Around 10% of the energy is transferred to support the next trophic level.

C. tertiary consumers

D. wolves

Explanation:

I just did it.

Answer 2

1) The primary source of energy in most ecosystems is; Option B; The Sun

2) An autotroph in a grassland ecosystem is; Option B; prairie cordgrass

3) The statement that best explains why there are fewer secondary consumers than producers is; Option A; Around 10% of the energy is transferred to support the next trophic level.

4) The tropic level that ingests the most biomass in order to receive the energy they need is; Option C; Tertiary Consumers

5) The species among the given ones that is a keystone specie is;

Option D; Wolves

1) The primary source of energy in virtually all ecosystems is solar energy from the sun. This solar energy is used by photoautotrophs to prepare food. Meanwhile all other organisms are usually dependent on autotrophs for their food.

2) An autotroph is defined as an organism that can produce its own food using light, water, carbon dioxide e.t.c. Therefore, they are called called producers. The only autotroph in the options is Prairie Cordgrass.

3) There are fewer secondary consumers than primary consumers due to the fact that for secondary consumers to be alive, they need to eat a lot of primary consumers. Thus, it means a percentage of the energy which is believed to be around 10% is transferred to support the next autotrophic level.

4) From the given options, the trophic level that ingests the most biomass in order to receive the energy they need is called Tertiary consumers.

5) A keystone specie is a type of specie defined as an organism that helps to determine an eco system. Which means if it is taken out of an eco system, all others are affected. In this example given, the keystone specie is clearly Wolves.

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Related Questions

Viral DNA/RNA takes over the cell’s organelles to ?

Answers

Answer:

just in internet:

Chloe loves science, but she wants a career in law enforcement. Chloe can become a scientist using biotechnology and still help fight crime by improving methods for which of the following? A.Disease prevention//B. DNA testing//C.Identification of metals//D.High-speed communication

Answers

I believe that Chloe could help improve methods for DNA testing

Hope this helps

Sorry if wrong


The visible characteristics of an organism, such as hair color, describes the
that organism.

O Phenotype
O Genotype

Answers

i think it’s phenotype bc phenotypes is what the natural selection acts on bc it’s what interacts with an organisms environment and not the genotype.

male and female rabbit were placed in a deserted habitat with a good supply of water and food. which will most likely happen to the rabbit population?

A. Naturally-occurring bacteria will infect the rabbits, leaving them unable to reproduce.

B. The rabbits will not adjust to their new Habitat.

C. The rabbits will breed, increasing the size of the population until the carrying capacity is reached.

D. predators will come into habitat and kill all of the rabbits.​

Answers

Answer:

C. The rabbits will breed, increasing the size of the population until the carrying capacity is reached.

Explanation:

Answer:

The answer would be "C"

Explanation:

This is because there would be no predators able to eat them, no other animals interfering with them, and enough food for them to not be worrying about finding food instead of reproducing.

Have a blessed day! Please mark brainliest if correct! :D

why is left lung smaller than right lung​

Answers

Answer:

I guess I should guess sit correct.

Explanation:

if the left lung's size is equal to the right lung's size, then there wont be any space for the heart.

so the space left on your left lung is occupied by the heart.

hope it helps :)

The lung on the left side is smaller than your right to make extra space for your heart

In a Punnett Square, where are the parent alleles written _:

a. On the top and inside the boxes
b. Only on the left and right sides of the boxes.
c. Outside of the boxes (top and left side)
d. All on the top side of the boxes.

Answers

The parent alleles are written above the boxes and to the left of the boxes

So i believe C is the correct answer :)

In a Punnett Square parent alleles are written Outside of the boxes (top and left side).

What is a Punnett square?

The Punnett square is a table in which all of the possible outcomes for a genetic cross between two individuals with known genotypes are given.

What is genotype in Punnett square?

A genotype is the genetic makeup of the organism. This is shown by the three genetic conditions described earlier (BB, Bb, bb). The phenotype is the trait those genes express.

Hence, C is correct option

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Which process doesn't happen in the leaves?
a) Transpiration.
b) Absorption of water and nutrients.
c) Production of chlorophyll.
d) Respiration (taking CO2 in and letting 02 out).

Answers

I believe it is the production of chlorophyll. Respiration occurs in all living cells including leaves.

which target organ releases glucose into the blood-stream as a result of the action of adreline?

a) adrenal gland
b) kidney
c) liver
d) pancreas

Answers

The answer for this is the liver

The target organ that releases glucose into the bloodstream as a result of the action of adrenaline is the liver, which is present in Option C, as the liver stores the glucose in the form of glycogen.

What is the importance of glycogen in the body?

Glycogen is a polysaccharide that is stored in the liver and muscles of the human body and plays a crucial role in maintaining the body's energy as well as glucose homeostasis. During exercise or physical activity, glycogen is broken down into glucose, which is then released into the blood as fuel; this is regulated by hormones such as insulin and glucagon and prevents hyperglycemia.

Hence, the target organ that releases glucose into the bloodstream as a result of the action of adrenaline is the liver, which is present in Option C, as the liver stores the glucose in the form of glycogen.

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Bushy Viper or Narwhal

Answers

Answer:

Narwhal is cool.

Explanation:

Not big fan of snakes. But the sound Viper would sound cool in a car model.

PLEASE help I can’t solve this

Looking at the chart provided, the students need to develop a classification scheme to distinguish plant and animal cells. The presence of which of the following structures/organelles would be most useful for this purpose?

Answers

Answer:

The correct answer would be - cell wall and chloroplast

Explanation:

The cell wall and chloroplast both are the main characteristic feature of the plant if present together in any cell of organisms. In most of the cells other than plant cells, the cell wall and chloroplast does not present together.

The cell wall is the outer rigid structure of plant cells made up of cellulose provide support and injuries. Chloroplast is the major and important structure of the plants responsible for their color and production of glucose by the process known as photosynthesis.

These two organelles would be most useful as all other organelles are similar and found in all cells given in the chart.

PLEASE HELP no one is helping I will mark you a brainliest

Answers

Answer: #1 It's 12 seconds. #2 I'm not sure what velocity is  it might be 240 but I didn't learn that.  #3  37.5 kilometers

Explanation:

Evidence gathered by studying the composition and movement of distant galaxies indicates that the universe expanded rapidly from a single small point. The universe has continued to expand for over 13 billion years.
Which statement is in agreement with the current understanding of the expanding universe?

A. All matter and energy were contained inside the small point.

B.)Matter and energy came from dark areas of the universe and were attracted to the small point.

C.)Matter and energy fell into the small point the same way a black hole attracts matter and energy.

D.)Matter was condensed into a single point until energy was attracted to the matter from dark areas of the universe.

Answers

Answer: the answer is a: all matter and energy were contained inside the small point.

Explanation: Because I got this right on my quiz I promise!

What is the first step of cytokinesis in plant cells?

Answers

Answer:

yesnvgubcdyjbbccfgjjjffthvcdthbfdaaadhjllgd

ans is wrong

Cytokinesis is the partitioning of the cytoplasm following nuclear division. This process presents a number of challenges for the plant cell: first, to avoid losing or bisecting the nucleus, this event needs to be carefully coordinated with respect to the nuclear cycle in space and in time.

You are solving a density problem, where density = mass/volume. Your volume of liquid is 2.1 milliliters. Your mass of the liquid is 2.811 grams. What is the density of the liquid using the correct number of significant figures?


The correct density is?

Answers

Answer:

whats the answer?

Explanation:

i have the same question... what school do you go to?

What are the features of bacterial genetic material?

#1
Bacterial genetic material is associated with proteins and consists of several small DNA molecules with a single copy of each gene.

#2
Bacterial genetic material is not associated with proteins, and consists of a DNA loop with a single copy of each gene.

#3
Bacterial genetic material is associated with proteins and consists of a DNA loop with multiple copies of each gene.

#4
Bacterial genetic material is not associated with proteins, and consists of several small DNA molecules with multiple copies of each gene.

Answers

Answer:

the answer is 2#

Explanation:

the CDMA

Answer:

Bacterial genetic material is not associated with proteins, and consists of a DNA loop with a single copy of each gene.

What is the corresponding mRNA sequence from the DNA strand CGA TTA CAG

Answers

Answer:

CGA-TTA-CAG

GCU-AAU-GUC

Explanation:

Please check with the codon chart and see if I am correct.

What sugar is found in DNA?

Answers

Answer:

The sugar in deoxyribonucleic acid (DNA) is deoxyribose. The deoxy prefix indicates that the 2′ carbon atom of the sugar lacks the oxygen atom that is linked to the 2′ carbon atom of ribose (the sugar in ribonucleic acid, or RNA)

Explanation:

Hope this helped

Describe the
relationship
between the age
of rock layers and
a fault

Answers

Answer: The relative age of a rock, then, is its age in comparison with other rocks. ... The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. The fault cuts through all three sedimentary rock layers (A, B, and C) and also the intrusion (D)

Explanation: The relative age of a rock, then, is its age in comparison with other rocks. ... The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. The fault cuts through all three sedimentary rock layers (A, B, and C) and also the intrusion (D)

Which describes the notation Tt for the trait of plant height?

Answers

Answer: Heterozygous genotype

Explanation: it has two variant forms of a gene that is ‘T’ and ‘t’ which shows dominant and recessive allele respectively.

Answer:

Heterozygous genotype

Explanation:    

Is phenotype a physical trait?

Answers

Answer:

The term "phenotype" refers to the observable physical properties of an organism; these include the organism's appearance, development, and behavior. 

Which characteristics is shared by both prokaryotes and eukaryotes

A. need oxygen gas to breathe
B.maintain homeostatis
c.make their own food
D.have organ system

please make sure it's correct when you're answering guyz im taking the finals which is a serious test . ill mark you brainliest thanks

Answers

Answer:

( d ) have organ system

Explanation:

not found

Glands of the endocrine system release their hormones

Answers

Answer:

Hormones and the Endocrine System

Where the hormone is produced Hormone(s) secreted

Pituitary gland Antidiuretic hormone (vasopressin)

Pituitary gland Adrenocorticotropic hormone (ACTH)

Pituitary gland Growth hormone (GH)

Pituitary gland Luteinizing hormone (LH) and follicle-stimulating hormone (FSH)

hope its right

A change is a single nitrogenous base can cause a mutation called which of the following
A. evolutionary mutation
B. point mutation
C. micromutation
D. zoomatic mutation

Answers

Answer:

The correct answer is - option B. point mutation.

Explanation:

A genetic mutation occurs due to a change in a single nucleotide base, either inserted or deleted from the genetic material (DNA or RNA) sequence, which represents the mutation called a point mutation.

It can take place by the substitution of the single nucleotide sequence in DNA or RNA in the genome of the organism, it is also known as substitution mutation.

Sickle cell anemia is an example of the point mutation that takes place due to a change in a single nucleotide sequence.

Think about the concept of evolution.

Would you say this is a hypothesis or a theory? Think about the difference between a theory and a hypothesis and try to apply it to the concept of evolution.

Definitions:
In science, a theory is more like a scientific law than a hypothesis. A theory explains a set of observations or events. It must be verified multiple times by many different scientists. One scientist cannot create a theory on his or her own.

A hypothesis is an educated guess based upon observation. It is an explanation of a single event based upon what is observed. A hypothesis has not been proved but can be supported by experimentation.

Answers

its for the first onehypothesis

h

Concept of evolution is a theory.

It is a scientifically accepted explanation of the facts that life and many forms has changed over year.

What is evolution?

Evolution is a the change in the characteristics of a species over several generation and relies on the process of natural selection.

 

What is natural selection?

It is the process through which a population of a organism adapt to changing environment and pass its gene to the next generation.

To know more about evolution here

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HELP!! ASAP!! PLEASE!!

Answers

Answer:

the offspring percent would be 25% would end up.

9th grade biology question. 10pts

Answers

Answer:

b

Explanation:

Pls answer I have a test soon !!!! Any help appreciated

Answers

Answer:

A,C,D

Explanation:

B,C,A

help me plz and I need it fast .​

Answers

Answer:

Why did ancient Greece have many different city states

Explanation:

Answer:

Answer is D

Explanation:

Albinism (the total lack of pigmentation) is recessive (and really rare!) in humans. If an albino female marries a normal but heterozygous male:

a) What are the chances they will have an albino child? (Looking for a % here)

b) What are the predicted GTs and PTs of their children?

Answers

Answer: not sure on the percentenge all i know is the albino gene is a recessive gene

Explanation:

Your kidneys and stomach are made of many tissues working together.
What does that make you kidneys and stomach?
Cells
Tissues
Organs
O Organ Systems

Answers

Organ system because they work together its more than one
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