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Mariana [72]
3 years ago
6

Pollen grains develop in which structure?

Biology
1 answer:
Mama L [17]3 years ago
5 0

Answer:

Pollen grains develop in the stigma.

Explanation:

In botany, the part of the gynecium that receives pollen during pollination is called stigma.

They are regions on the outer side of the surface of the carpels (the female leaves of the flower), separated from the ovary by style. Its surface is generally papillose, where each papilla is a cell, and moist, two features that facilitate the adherence of pollen. Once in the stigma, the pollen germinates, opening and growing from it a pollen tube through which the nucleus or nuclei that carry out the fertilization of the female gametes move. The tube must penetrate through the stigma and style tissue.

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The body uses carbohydrates for _____ - term energy storage.
Juli2301 [7.4K]

Answer: The body uses carbohydrates for both long term and short term energy storage

Explanation: Some of the energy our body saves is only there for a certain amount of time or we use our energy so therefore it is Short term storage

We also have long term storage since we don't use all of our energy all the time and it needs to be stored some where

4 0
3 years ago
Briefly explain how greenhouse gases, (carbon dioxide in particular) can absorb and radiate heat inside Earth's atmosphere there
Irina18 [472]

Answer:

Explanation:

some gases prevent the escape of heat from the earth.There will be an increase in the percentage of such gases would cause the average temperatures to increase world wide.This is known as greenhouse effect.Carbon dioxide is one of the green house gases.An increase in the carbon dioxide content in the atmosphere woul cause more heat to be retained by the atmosphere and lead to global warming.

4 0
3 years ago
Explain natural selection and adaptations of bacteria
faust18 [17]

Natural selection can cause speciation, which increases the biodiversity of an ecosystem. Several bacterial colonies are placed on a petri dish that contains agar with antibiotics. After 24 hours, ninety percent of the original bacteria die, but the remaining ten percent survive and later reproduce.

6 0
3 years ago
Need The Answer ASAP
Anna35 [415]

Answer:

<em>The correct option is B) as the light colored moths were seen and eaten, the allele for dark colour became more prevalent in the population.</em>

Explanation:

The process of natural selection tends to favour those organisms which are better adapted to live in an environment. Evolution changes the allele frequencies of a population over time depending on the traits favoured by natural selection.

Before the industrial revolution, the colour of the trees was lighter and hence, the light coloured moths were better adapted to such environments as they could hide from predation. After the industrial revolution, the colour of the woods of trees became darker. The light coloured moths were no more able to hide from their predators and hence their population declined.

4 0
3 years ago
What group of animals has flexible hands and feet, large brains in relation to body size, forward-looking eyes, and arms that ca
Lana71 [14]
<h2>Primates </h2>

Explanation:

Primates are a group of animals has flexible hands and feet, large brains in relation to body size, forward-looking eyes, and arms that can rotate in a circle around the shoulder joint

  • Primates include the lemurs,lorises,monkeys,apes and humans
  • The order Primates, with its 300 or more species, is the third most diverse order of mammals, after rodents and bats
  • The Primates order is divided informally into three main groups: prosimians, monkeys of the New World, and monkeys and apes of the Old World
  • All primates have five fingers (pentadactyly), a generalized dental pattern, and a primitive body plan
  • Another distinguishing feature of primates is fingernails
  • Opposing thumbs are also a characteristic primate feature
  • When compared with body weight, the primate brain is larger than that of other terrestrial mammals, and it has a fissure unique to primates that separates the first and second visual areas on each side of the brain
  • The eyes face forward in all primates so that the eyes visual fields overlap
  • Fossils of the earliest primates date to the Early Eocene Epoch (56 million to 40 million years ago) or perhaps to the Late Paleocene Epoch (59 million to 56 million years ago)
5 0
3 years ago
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