If an object moves closer to an octopus, must the octopus move its lens closer to or farther from its retina to keep the object

The best answer is D

The word chloroplast is derived from the Greek word "chloros"  meaning "green" ,  and  "plastes"  meaning  "the one who forms"

Chloroplasts are cellular organelles found in autotrophs namely  green plants and are filled with the green pigment called chlorophyll.

These organelles conduct photosynthesis. With the help of chlorophyll, they absorb sunlight and convert it into sugar molecules and also produce free energy stored in the form of ATP and NADPH through photosynthesis.  

The leaves on the  plants have the highest concentration of chloroplasts.

Survivorship is the probability that individuals from the original cohort (age 0) get to a certain age (age x). Survivorship up to the start of March is 0.8.  

It is a representation of life and death patterns in a cohort. It includes the probability for different organisms in the population to live, survive, reproduce or die.

It is composed of information provided by parameters like age structure, natality rate, and death rate per age concerning the whole population.

There are two types of life tables:

• Horizontal life table
• Vertical life table

This is a representation of a cohort destiny, from the born moment to the death moment of all individuals, including survival and fecundity per age.

A cohort is a group of individuals of the same age that are incorporated into the population at the same time.

This table is based on different vital statistics. Among them, we can mention,

• Number of individuals registered at a certain age, N(x)

• Number of individuals at initial age (recent born, seeds, propagule), N(0)

• Specific survivorship per age, l(x)

• Transition rate from one age to the next one, p(x)

• The proportion of the original cohort that dies during a certain age x, d(x)

• Specific mortality per age, q(x)

Specific survivorship per age, l(x), is the proportion of individuals from the original cohort that gets to survive reaching a certain age. It is the probability that a recent born gets to a certain age.

l(x) = N(x) / N(0)

Values must go from <u>0 to 1</u>. By definition, when l(x) = 1, then X = 0

In the exposed example, we know that

• N(0) = 200 rats ⇒ new borns
• N(x) = 160 rats ⇒ three months individuals

l(x) = N(x) / N(0)

l(x) = 160 / 200 = 0.8

Survivorship specific per age up to the start of March is<u> 0.8 = 80%</u>

You can learn more about life tables at

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Answer:

Due to number of amino acids.

Explanation:

The main differences might be expected in the amino acid composition of X versus Y because the X polypeptide is made up of one smaller unit of amino acid while on the other hand, Y polypeptide is made up of four smaller units of amino acids. The  name of X is monomer which means composed of one amino acids while Y exists as a tetramer which means it has four amino acids. So we can conclude that the main difference between X and Y is the presence of  number of amino acids.

<u>Answer</u>:

1. Rain droplets on the window - precipitation

2. Fog on the bathroom mirror after a hot shower - condensation

3. Drying of a wet modded floor - evaporation

<u>Explanation</u> :

The <em>water cycle</em> describes the cyclic movement of water between the land and the atmosphere.

The water cycle involves many processes such as evaporation, condensation, and precipitation.

1. <u>Evaporation</u>

• The process of evaporation involves the heating up of water present in various sources and its conversion into gas form.

• Since drying of wet modded floor involves the conversion of water into gas due to heat, this process is an example of <em>evaporation</em>.

2. <u>Condensation</u>

• The process of condensation involves the cooling of the evaporated water as it reaches the atmosphere resulting in the formation of clouds.

• Similarly, after a hot shower, the water cools down on the mirror and forms fog. Thus, this is an example of <em>condensation</em>.

3. <u>Precipitation</u>

• When too much water has been collected in the clouds they become too heavy to hold water, and thus, the water falls down on the surface of the earth in the form of rain, snow or sleet. This process is known as precipitation.

• Thus, rain droplets  seen on the window is an example of <em>precipitation</em>.