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3 years ago

What is a pheromone?

2 answers:

7 0

A pheromone is a chemical compound that some organisms release. Pheromones enter the environment and they can affect the behavior of other species.

Marianna [84]3 years ago

5 0

a chemical substance produced and released into the environment by an animal, especially a mammal or an insect, affecting the behavior or physiology of others of its species.

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Which of the following is true of ecological succession? A-pioneer organisms move into new communities first. B-primary producti

Nesterboy [21]

Answer: Pioneer organisms move into new communities first.

Explanation:

6 0

3 years ago

The human genome comprises just over 3.1 billion base pairs. Assuming average nucleosome spacing throughout the genome, how many

Ymorist [56]

Answer:

Option C, 32 million

Explanation:

As per standard rule -

Number of base pair per nucleosome is equal to $200$

Now, the total number of base pair in human genome is $3.1$ billion.

Number of nucleosome in $3.1$ billion base pairs is equal to

$\frac{3.1* 10^9}{200} \\= 1.55 * 10^ 7$

These are diploid cells and hence the number of nucleosomes will be 2n

Hence, the total number of nucleosomes are

$1.55 * 10^7 * 2\\3.1 * 10^7\\$

Hence, option C is correct

5 0

3 years ago

Which of the following shows an incorrect digestion of a molecule into its components?A. Fat digested into fatty acids and glyce

muminat

Introduction to Biology: Biomolecules: Carbohydrates, proteins, lipids, nucleic acids.

The macromolecules such as nucleic acids, carbohydrates, and proteins can form<em> </em>polymers<em>,</em> which means that there is a chain of multiple basic units or monomers.

Proteins are chains of amino acids, nucleic acids are made of nucleotides, and the simplest carbohydrates are monosaccharides such as glucose or galactore.

On the other hand, lipids are very diverse hydrocarbons and include fatty acids, sterols, waxes, phospholipids, monoglycerides, diglycerides, and triglycerides.

Of the options, the one with an incorrect digestion is D, because a sugar or carbohydrate is not made of nucleic acids.

This means D. Sugar digested into nucleic acids would be the correct answer.

7 0

2 years ago

What quantity of carbon dioxide was in the atmosphere in 1980? 317 ppm 326 ppm 339 ppm 371 ppm

SOVA2 [1]

The answer is 371ppm

7 0

4 years ago

Read 2 more answers

Which cells or organelles were the earliest contributors to increasing oxygen availability in the atmosphere? A. Chloroplasts B.

blondinia [14]

Answer:

A. Chloroplasts.

Explanation:

Chloroplasts are organelles found in leaves of green plants and they conduct photosynthesis. They contain chlorophyll pigment which captures sunlight and convert it to energy.

Photosynthesis is the process whereby green plants manufacture their food from carbon dioxide and water in the presence of sunlight and they release the oxygen.

So, in the presence of chloroplast, photosynthesis takes place and oxygen is released into the atmosphere.

8 0

4 years ago