BIOLOGY HIGH SCHOOL

The adjustable opening in the center of the eye that helps control the amount of light entering the eye is called the __________.

Answers

Answer 1
Answer: The iris controls the amount of light entering the eye.
Answer 2
Answer:

Answer:

c. pupil

Explanation:

Related Questions

If a moon were discovered to be at 1.5AU from the sun, it would be how far from the sun in kilometers? A. 22,500km B.225,000km C.22,500,000km D.225,000,000km
Which is an example of the beneficial application of plants in human society? Plants used for food can cause deforestation. Plants can be used to make materials. Plants cover every continent. Plants have many different kinds of tissues.
Serous membrane is what type? Epithelial or connective?
Agriculture, forestry, and mining would fall under which distinct industry category?a. primary b. secondary c. tertiary d. quaternary
The northern red-legged frog, or Rana aurora, is found along the western coast from British Columbia to Northern California. Their typical breeding season lasts from January to March. The foothill yellow-legged frog, or Rana boylii, is found along the western coast from northern Oregon to central California. Their typical breeding season lasts from April to July. What mechanism might keep Rana aurora and Rana boylii from mating?A.)anatomical isolation B.)temporal isolation C.)geographic isolation D.)behavioral isolation

After a period of (blank), a person who divorces will begin to construct a new identity as a single person. A: attachment anxiety
B: separation anxiety
C: separation shock
D: attachment shock

Answers

C) separation shock.
hope this helps you.

8. Classification of living things takes into consideration all of the following except A. presence of cell membranes.
B. mode of nutrition.
C. presence of a nucleus.
D. number of cells.

Answers

The answer is A. presence of cell membranes.

A classification of living things can be based on many different characteristics but a presence of cell membranes is not one of them. ALL living things have cell membranes. So, there could be no classification of organisms with cell membranes and organisms without cell membranes.
On the other hands, based on mode of nutrition, organisms can be classified of autotrophs and heterotrophs. Based on presence of nucleus, organisms can be prokaryotes (without a nucleus) and eukaryotes (with the nucleus). Number of cells is base for classification of living things on unicellular and multicellular.

Which environmental factor would likely lead to an increase in genetic variation in a population of squirrels? an increase in predators an increase in available food an increase in forest fires an increase in pollution

Answers

Answer;
An increase in available food and and also decrease in predators would most likely increase the genetic variation in a population. 

Explanation; 
Genetic variation is essential for natural selection since the natural selection can only increase or decrease the frequency of alleles that already exist in the population. Genetic variation may be caused by mutations, and random mating between organisms. 
Increase in the available food also increases the genetic variation as organisms are able to interact freely and thus increases the chances of random mating.  

Answer:

an increase in availability of food

Explanation:

An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet. What’s one advantage of using electromagnets in devices

Answers

Answer:

The prime advantage of using electromagnets in a device is that it can be easily turned on and off.

Explanation:

The formation of electromagnets is done by winding a wire via a magnetic substance and then passing an electric current through it. The durability of the electromagnet relies upon the size of the electric current via the coil and the number of coils.  

On the other hand, the regular magnets do not need power, however, it is reliant upon the kind of material that is, used to produce it. Thus, it is advantageous to utilize electromagnets in comparison to permanent magnets as the strength of the electromagnet can be amended easily by monitoring the concentration of current flowing through it. Thus, it is easy to turn off and on any device containing an electromagnet.  

Electromagnets can be switched on and off. This is good in a scrap yard because they need to pick heavy pieces of metal and then drop it.

which of the following refers to an organism's ability to maintain constant conditions within its body? a. metabolism b. homeostasis c. stimuli d. sexuality

Answers

The answer to your question is sexuality

Which of the following is LEAST likely to be important in holding the components of a biological membrane together? hydrophobic interactions between the phospholipid tails and the surface of intergral membrane proteins buried in the membrane polar interactions among the phospholipid head groups on the same surface of the membrane hydrophobic interactions among the fatty acid tails of phospholipids on opposite sides of the membranes covalent interactions between the phospholipid and protein components of the membrane hydrophobic interactions among the fatty acid tails of phospholipids on the same side of the membrane

Answers

The component that is LEAST likely to be important in holding the components of a biological membrane together is C: "covalent interactions between the phospholipid and protein components of the membrane".

The biological membrane is made up of a lipid bilayer, with the hydrophobic tails of the phospholipids facing inward and the hydrophilic heads facing outward. The main forces that hold the membrane together are hydrophobic interactions between the phospholipid tails and the surface of integral membrane proteins buried in the membrane, polar interactions among the phospholipid head groups on the same surface of the membrane, and hydrophobic interactions among the fatty acid tails of phospholipids on opposite sides of the membrane.

Covalent interactions between the phospholipid and protein components of the membrane are not typically important in holding the membrane together. These interactions are much stronger than the other types of interactions and are not typically found in biological membranes. Instead, the membrane components are held together by weaker, non-covalent interactions that allow for the fluidity and flexibility that is necessary for the membrane to function properly.

You can learn more about  biological membrane at

brainly.com/question/14245378

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