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andrey2020 [161]
2 years ago
9

Why are gymnosperms no longer restricted to moist environments, as are ferns and mosses?

Biology
1 answer:
erastovalidia [21]2 years ago
7 0

Gymnosperms are no longer restricted to moist environments, as are ferns and mosses because they have evolved to produce non-flagellated pollens that do not require water or moisture to reach the egg whereas ferns and mosses have flagellated sperm that needs moisture to swim towards the egg.

Another major evolutionary adaption in gymnosperms is the production of seeds instead of spores since seeds contain their own nutrition in the form of endosperm, seeds can travel large distances through wind or animals and can germinate when they find suitable conditions. Seeds can remain dormant for several years whereas spores have a shorter lifespan.

To learn more about endosperm here

brainly.com/question/87065

#SPJ4

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The correct answer will get Brainliest!
Leto [7]

Answer:

Diversity of the community = 2.097

Explanation:

Given:

Number of pitch pines = 134

Number of douglas firs = 24

Number of red pines = 53

Find:

Diversity of the community

Computation:

Simpson's diversity index = N(N-1)/Σn(n-1)

Particular              n n(n-1)

Pitch pine         134       17822

Douglas firs       24 552

Red pine            53  2756

Total       N=211 21130

So,

D= [211(211-1)] / 21130

D = 2.097

Diversity of the community = 2.097

7 0
2 years ago
How does a decrease in biodiversity impact an ecosystem?
lidiya [134]
Biodiversity is essential to an ecosystem's resistance against viruses and famine. In history, there has been many cases in which a lack of biodiversity has allowed a virus or disease to endemically wipe out an entire species of plant. This will subsequently affect all consumers of each trophic level. Ex: A disease that attacks the DNA of only one certain species of plant would cause decreases in the population of the organisms that rely on eating that plant, the organisms that rely on eating those organisms, and so on. This is caused by a decrease in food source, thus not being able to sustain the ecosystem's demand, thus naturally killing off any organisms that would not be able to find a sufficient food source.
6 0
3 years ago
Read 2 more answers
vaccination have been proven to prevent and in some cases eradicated infectious diseases read the prompt to determine what state
MAVERICK [17]

Answer:

A,C,D,E,F is the correct answer choices

Explanation:

5 0
3 years ago
What weight of Tris-HCL (MW=121) is required to prepare 2L of a 15% w/v solution?
podryga [215]

Explanation:

Percentage w/v means that weight of solute present in 100 ml of a solution. Hence, 15% w/v means that 15 gram of solute per 100 ml of solution.

Hence, for 2 L (or 2000 mL) preparation the amount of mass will be calculated as follows.

                 \frac{15 g}{100 ml} \times 2000 ml

                  = 300 g

Thus, we can conclude that weight of Tris-HCL required is 300 g.

7 0
3 years ago
Bottled water is regulated by the ______, whereas tap water is regulated by the ______.
ioda

Bottled water is regulated by the FDA (Food and Drug Administration), whereas tap water is regulated by the EPA (Environmental Protection Agency).

5 0
3 years ago
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