A B C D ?????? Earth science

Biology

2 answers:

Leto [7]4 years ago

8 0

The answer of earth science is A

omeli [17]4 years ago

6 0

It's a term i havent heard before, but i'd say its A. The two oceanic plates appear to spead from each other

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A student conducted an investigation to study phototropism in grasses. The only difference between the control group and the exp

Maurinko [17]

Answer:

Option-B

Explanation:

Phototropism refers to the movement of plants in response to light. The mechanism of phototropism involves the photoreceptors which respond to a different wavelength of light: the phytochromes to red light, cryptochromes to blue light and the phototropin to the UV light.

Plants integrate the signals obtained from these receptors and then activates the gene which will be involved in the phototropism.

The gene could be the production of the auxin hormone and the PIN proteins which helps in the distribution of the auxin in the plants. Due to the production of this hormone and its distribution in the shoot, the grass tips bend towards the light.

Thus, Option-A is correct.

3 0

4 years ago

Ecosystems change when _______. a. living components of an ecosystem change b. nonliving components of an ecosystem change c. th

ICE Princess25 [194]

Ecosystems change when all of the above components listed change ie, living components of an ecosystem, nonliving components of an ecosystem, or their stability is disrupted.

Hence correct option is D.

A community of creatures and their physical environment make up an ecosystem.
Ecosystems can be terrestrial, aquatic, or marine and come in a variety of sizes.
The term "biome" refers to broad classifications of terrestrial ecosystems. Ecosystems, the dynamic network of living and nonliving things in a place, change gradually over time.
New plants and animals either thrive or suffer when they are introduced to a region. Sometimes thriving species suppress native species. The system as a whole starts to shift when this occurs.
If the living components i.e., flora and fauna of the ecosystem change then there will be increase or decrease in food availability and either surge in predators or no predators at all. hence it will greatly affect the ecosystem.
non living components such as temperature, water availability, natural calamities can also affect the ecosystem. it can lead to extinction or migration from one place while influx of immigration to another.
if the stability of ecosystem is disrupted due to change in living and non living components then also the ecosystem will be affected.