What can make the shoots of seedlings on the window sill bend toward the window would be the production of hormones in response to light stimulus.
<h3>What is Phototropism?</h3>
It is the movement of organisms in response to light. It can be of two types:
- Positive phototropism when the organism moves toward light.
- Negative phototropism when the organism moves away from light.
Plants are generally positively phototropic. The light stimulus stimulates the production of a hormone whose activities cause the plant to bend towards the light source.
More on phototropism can be found here: brainly.com/question/15517003
#SPJ1
The control group is the one not given calculators because they are the “as seen in nature” group. The experimental group would be the ones with calculators.
The density of a population of living organisms is usually measured in individuals on one square km. In here we have 50 earthworms on an area of 5 square meters, thus we have 10 earthworms on every square meter. In order to get to the result we need to see first how many square meters there are in one square km. One square km has one thousand meters of length and one thousand meters of width so:
1,000 x 1,000 = 1,000,000 km²
Since we established that we have 10 earthworms on every one square meter, we just need to multiply the number of square meters with the amount of earthworms on every square meter:
1,000,000 x 10 = 10,000,000
So we have a density of 10 million earthworms per square km.
Explanation:
The fruits protect the seeds enclosed in the ovary. The seeds mature in the fruit by taking essential requirements.
The mature seeds retain the capacity of germination for a long period. It may be dispersed individually or along with the fruits to long distances by different agencies. The seeds germinate in the favorable conditions.
These are the advantages of fruits and seeds in the Angiosperms. These advantages help the spread of the Angiosperms in different climatic conditions. Thank you
<span>An ecosystem<span> consists of a community of organisms together with their physical environment.
</span><span>Ecosystems can be of different sizes and can be marine, aquatic, or terrestrial. Broad categories of terrestrial ecosystems are called </span>biomes.
In an ecosystem, both matter and energy are conserved. Energy flows through the system—usually from light to heat—while matter is recycled.
<span>
Example - </span>a community<span> consists of all the populations of all the species that live together in a particular area. </span></span>