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
ikadub [295]
3 years ago
10

Which of the following is caused by the modification of density–independent factors? A. Parasitic wasps invade cocoons, killing

many caterpillars. B. Periodic drought causes an abrupt decrease in vegetation. C. Organisms compete for food, water, and other resources.
Biology
2 answers:
Anton [14]3 years ago
6 0

Answer;

B. Periodic drought causes an abrupt decrease in vegetation.

Explanation;

-Density-independent factors are those factors limiting the size of a population whose effect is not dependent on the number of individuals in the population, such as weather and climate, exert their influences on population size regardless of the population's density.

-The density dependent factors on the other hand are factors whose effects on the size or growth of the population vary with the population density. There are many types of density dependent limiting factors such as; availability of food, predation, disease, and migration.

liubo4ka [24]3 years ago
3 0
"Periodic drought causes an abrupt decrease in vegetation" is the one among the following that <span>is caused by the modification of density–independent factors. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer has helped you.</span>
You might be interested in
What is the volume of 0.25 mol of ammonia gas at 1.00 atm and 273 K? (R= 0.0821 Latm/molK)What is the volume of 0.25 mol of ammo
ICE Princess25 [194]

Answer:

5.6L

Explanation:

Given parameters:

number of moles  = 0.25mol

pressure on gas  = 1atm

temperature  = 273K

Gas constant R = 0.0821Latm/molK

Unknown:

Volume of gas  = ?

Solution:

Using the ideal gas equation, we can solve this problem. The equation is a combination of the three gas laws: Boyle's law, Charles's law and Avogadro's law.

It is mathematically expressed as;

             PV = nRT

where P is the pressure

           V is the volume

          R is the gas constant

          T is the temperature

          n is the number of moles

All the parameters are in the appropriate units and we simply solve for the volume of the gas;

                1 x V = 0.25 x 0.0821 x 273

                      V  = 5.6L

4 0
3 years ago
A student drew this model of the trophic levels of an ecosystem. How can you improve this model’s accuracy?
Gelneren [198K]

B, because as energy is move up form the phyramid, energy is lost.

7 0
3 years ago
Read 2 more answers
Which answer best defines what the Lotka-Volterra predator-prey model mathematically describes?-The competition among many preda
yanalaym [24]

Answer:

The simultaneous effect of a predator population on a prey population and a prey population on a predator population over time.

Explanation:  

The mathematical models of Lotka-Volterra equations explain the existing interaction between species in which prey and predator influence and affect each other. The model follows a few assumptions,    

  • The ecosystem is isolated and closed. There is no migration.
  • The whole individuals are reproductively equivalent.
  • In the absence of the predator, prey shows an exponential growth rate. The prey is in the ideal environment.  
  • When there is no prey, the predator population decreases exponentially because of the lack of food. The predator environment is ideal, but it is limited by prey density.  
  • The predation rate is proportional to the encounters rate, which also depends on density.  
  • The predators affect the prey populations, inducing its decrease proportionally to the number of prey and predators present.  
  • The prey population also influences the predator population proportionally to the number of encounters between the two species.  

In these equations, the variable D is the number of predators, and P the number of prey items.

The parameters are always constant:  

• r1: prey growth rate.  

• a1: predator hunting success.  

• r2: predator growth rate.  

• a2: the success of the predator in hunting and feeding.

In nature, many factors affect interactions, such as dense-dependent factors and dense-independent factors. Also, in reality, there are stochastic factors. Stochasticity refers to the variability in the system involving those factors that are affecting or influencing population growth. Stochasticity might be related to good years and bad years for population growth.

In real situations, the compliance of the whole assumption does not occur. The previously mentioned constants might vary, constantly changing the interaction between the predator and the prey. These parameters change in different degrees, resulting in varying circumstances for both species.

3 0
3 years ago
What are the two main phases of the cell cycle? Check all that apply. meiosis mitosis interphase
myrzilka [38]
Hello.

The answer is  interphase and <span>mitosis.

</span>interphase is the resting phase between successive mitotic divisions of a cell, or between the first and second divisions of meiosis.

mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

Have a nice day

7 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=3x%20-%206%20%2B%202x%20%3D%20%20-%202%20%2B%20x" id="TexFormula1" title="3x - 6 + 2x = - 2 +
dimaraw [331]
First move the x from the right side to the left by subtracting. 3x-6+2x-x=-2. combine like terms. 4x-6=-2. add six to both sides. 4x=4. divide 4 on both sides. x=1. hope this helped!
6 0
3 years ago
Other questions:
  • Study this image.
    6·2 answers
  • The second part of the mitotic phase, during which cell division is completed by the physical separation of the cytoplasm compon
    12·1 answer
  • Unlike in prokaryotic cells, replication in eukaryotic cells
    14·2 answers
  • Read each statement, then write down the correct state of interphase, meiosis (specific phase) or cytokinesis that the statement
    15·2 answers
  • Influenza, or the flu, is an infectious disease that affects mammals and birds. The flu cannot be treated with antibiotics becau
    11·2 answers
  • When liquid water is heated by the Sun, it often evaporates, becoming a gas and entering the atmosphere. When gaseous water is c
    10·2 answers
  • Chris is studying oxidation and reduction reactions. Which of the following could she use as an example of an oxidation reaction
    13·1 answer
  • The nitrogen cycle is carried out primarily by A.humans B.autotrophs C.bacteria D.fungi
    12·1 answer
  • Which description best fits the role of macrophages?
    10·1 answer
  • Actual gas exchange takes place in the<br> A)Trachea<br> B)Bronchi<br> C)Larynx<br> D)Alveoli
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!