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liubo4ka [24]
3 years ago
10

Bees may pick up pollen of one flowering species on a certain place on their bodies. If this area does not come into contact wit

h the receptive structures of the flowers of another plant species, the pollen is not transferred. This is an example of:
Biology
1 answer:
34kurt3 years ago
5 0

Answer:

Mechanical isolation

Explanation:

Mechanical Isolation is an evolutionary mechanism that results from barriers or structures that prevent the mating of different species. Evolution has resulted of the difference in the location, size and shape of the male and female genitalia, which further prevents mating in different species and sometimes, closely related species.

This type of isolation is mostly found to be common in flowering plants. For example, flowering plants that doesn't have the correct shape or size for a pollinator will definitely not be able to receive the transfer of pollen and hence fertilization will not occur.

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A hormone attaches to a target cell at a receptor protein. What do you know about this hormone?
charle [14.2K]
So, this hormone is a non-steroid hormone.  Steroid hormones are fat soluble and can pass directly into the cell to affect the nucleus.

Non-steroid hormones bind to the receptor and trigger a chemical change within the cell without ever entering the cell, or the nucleus.

The answer is: It will not enter the nucleus
4 0
3 years ago
How many calories are in an average trick-or-treaters halloween stash?
Vera_Pavlovna [14]

The number of calories on a Halloween stash depends on the type of candies and the number of units of each. If the stash contains 5 units of each of these candies: chocolate bars, taffies, lollypops, and candy corn the total number of calories is 1,650.

Calories are the most common unit used to define the energy a specific food gives to your body. For example, an apple has 52 calories, while a banana has 89 calories.

Considering this, in a Halloween stash the calories depend on two factors:

  • The types of candies or products
  • The units of each one

Let's suppose there are 5 units of each of the following candies:

  • Chocolate bars
  • Taffies
  • Lollypops
  • Candy corn

Let's now calculate the calories

  • Chocolate bars = 220 calories x 5 units =  1,100 calories
  • Taffies = 20 calories x 5 units = 100 calories
  • Lollypops = 83 calories x 5 units = 415 calories
  • Candy corn = 7 calories x 5 = 35 calories

Add all the previous results:

1,100 + 100 + 415 + 35 = 1,650 calories in total

Learn more in brainly.com/question/22374134

8 0
3 years ago
An adaptive radiation is________.
erastovalidia [21]

The correct answer is A. A burst of speciation

Explanation:

Adaptative radiation is part of evolution and occurs when a single organism or species diversify into a wide range of species (speciation), this process is called "adaptative" because the speciation occurs due to changes in the environment that make challenging survival usually due to the reduction of resources available and therefore organisms change to adapt to new conditions. Additionally, in adaptive radiation, the new organisms share traits with their common ancestor but also have different and unique traits. Considering this, it can be concluded adaptative radiation a burst of speciation.

8 0
3 years ago
The suprachiasmatic nucleus influences the release of melatonin by its effect on the ________________.
anyanavicka [17]

Answer:

Pineal gland

Explanation:

The suprachiasmatic nucleus is the paired nucleus made of about 1000 neurons each in the hypothalamus. The suprachiasmatic nucleus is involved in maintaining the endogenous clock or the internal clock.

The suprachiasmatic nucleus controls the circadian rhythm by controlling the amount of melatonin. The melatonin is produced by the pineal gland from the serotonin and tryptophan precursors.  The hypothalamus thus controls the amount of the melatonin by regulating the pineal gland.

Thus, Pineal gland is the correct answer.

5 0
3 years ago
All healthy, highly productive ecosystems provide which of these essential ecosystem services that involve gases in the atmosphe
madreJ [45]

Answer:

because

Explanation:

It is an Incomplete question and the complete question is

All healthy, highly productive ecosystems provide which of these essential ecosystem services that involve gases in the atmosphere?

A. increasing carbon dioxide levels in the atmosphere by the action of plants and animals.

B. removing carbon dioxide from the atmosphere and storing carbon in the tissues of organisms.

C. removing water vapor from the atmosphere and using it to support plant growth.

D. removing methane from atmosphere and storing it's carbon and hydrogen in the tissues of organisms.

Answer:

The answer is removing carbon dioxide from the atmosphere and storing carbon in the tissues of organisms.

Explanation:

The water and carbon dioxide are byproducts and in which the photosynthesis removes CO2 from the atmosphere and replaces it with O2. In case of respiration it takes O2 from the atmosphere and places it with CO2.

To remove the CO2 it is directly put out of the air and burried it under ground saline aquifers this process is known as carbon capture and sequestration.

Sequestration is a process in which CO2 is removed from atmosphere and stored in the soil carbon pool. This process is mainly done through photosynthesis.

5 0
3 years ago
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