1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
frez [133]
4 years ago
11

ecosystem productivity is principally limited by _______. a. sunlight and nutrient availability b. water and nutrient availabili

ty c. the availability of time and nutrients d. none of the above
Biology
2 answers:
lana66690 [7]4 years ago
7 0

Correct answer: A). Sunlight and nutrient availability

Sunlight and nutrients are the two important ingredients that are required by the plants in order to carry out the process of photosynthesis.

Green plants also called producers and they are known to fix solar energy and convert it into organic form as chemical energy. It is the green plant that is responsible for the primary productivity of the ecosystem.

Hence, sunlight and nutrients are the correct answer.





Pie4 years ago
5 0
A <span>sunlight and nutrient availability 

</span>
You might be interested in
Which sequence best represents the flow of energy through an ecosystem?
Virty [35]
The sequence, from the choices that you provided, that best represents the flow of energy through an ecosystem is sun-green plants-herbivores-carnivores. The correct answer choice will be 1. 
6 0
3 years ago
Read 2 more answers
What is the proper name of the plasma membrane found on a muscle fiber?
otez555 [7]

Answer:

Answered below

Explanation:

the plasma membrane of a skeletal muscle fiber is called the sarcolemma. The sarcolemma invaginates into the cytoplasm of the muscle cell (sarcoplasm). This forms membranous tubules that pass across the muscle cells.

3 0
3 years ago
Phenylketonuria (PKU) is a genetic disease caused by the inability to break down the amino acid phenylalanine. If untreated it l
tiny-mole [99]

Answer:

Therefore, 98% of the US population have no alleles for PKU

Explanation:

The Hardy-Weinberg equilibrium states that the amount of genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

The Hardy-Weinberg equilibrium is expressed quantitatively using a mathematical equation known as the Hardy-Weinberg equation. the equation is given below:

p² + 2pq + q² = 1

also, p + q = 1

Given a pair of alleles, S and s with A dominant and a recessive

where p is the frequency of the dominant allele in the population,

q is the frequency of the recessive allele in the population,

p² represents the frequency of the (SS)  dominant genotype,

q² represents the frequency of the (ss) recessive genotype,

2pq represents the frequency of the heterozygous genotype

From the given question,

q² = 1/10000 = 0.0001

q = 0.01

from p + q = 1

p = 1 - 0.01 = 0.99

p² = 0.98

Therefore, 98% of the US population have no alleles for PKU

4 0
3 years ago
Explain why a breeder would find it beneficial to synchronize heat and ovulation.
Lera25 [3.4K]
Heat detection is needed for breeding.There is a system called timed breeding or the appointment breeding which is made so that the onset of heat and ovulation are induced for an animal to be inseminated at the right time. These then will help the breeder as well as the owner.
8 0
4 years ago
Oyster fishermen used to capture and cut up starfish to try and rid themselves
8090 [49]

Answer:

This is possibly a bad idea because it could mess up the balance of the oceanic ecosystem and because of the drop in starfish, the whole food chain could get affected and plants and animals could die.

hope this helped

8 0
3 years ago
Other questions:
  • Viruses have the ability to infect a specific type of cell because they recognize
    14·1 answer
  • The life stage known as ____ is a stage of transition during which you work to find your own identity and decide what kind of a
    6·2 answers
  • Compare and contrast temperate and tropical rainforests.
    10·2 answers
  • In cold, snowy areas, water is added to the atmosphere through _____. sublimation condensation transpiration precipitation
    8·2 answers
  • Which statement describes the chromosome shown in Figure 5.2?
    9·1 answer
  • Explain how a ship made of materials that are much denser than water is able to float on water?
    6·1 answer
  • Biomedical laboratories routinely use ultracentrifuges, some of which are able to spin at 1.00 × 10 5 rev/min about the central
    13·1 answer
  • "Red rust is one of the destructive diseases in tea plants which results adverse effect on tea yield. It is caused by a type of
    6·1 answer
  • Scientific theories can be disproven or modified. True or false?
    14·1 answer
  • what element is missing from glucose and cellulose molecules but must still be consumed by urchins when they eat the kelp in ord
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!