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wlad13 [49]
3 years ago
11

The main source of organic matter in soil is

Biology
2 answers:
Pachacha [2.7K]3 years ago
6 0
The correct answer is bacteria. Bacteria abundant in soil is the main source of its organic matter. This is because bacteria release energy in their systems which causes the soil to be more fertile and more capable of sustaining plant material. Without bacteria general processes of soil formation will not be possible.
Liula [17]3 years ago
4 0

Plants are the main source of organic matter in soil. Animals and microorganisms also contribute. Microorganisms, including fungi, bacteria, and single celled protozoans, play an active role in decomposing dead plants and animals. Because organic material releases nutrients when it decays, it contributes to soil fertility. Some bacteria also aid soil fertility in the nitrogen cycle. The bulk of organic matter originates from plants.

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6. Before transferring sperm to the female during mating, the males of some species of beetles use their copulatory organs to re
scZoUnD [109]

Answer: Mechanical Isolation

Explanation:

Mechanical isolation is a type of barrier that prevents the species that are closely related from mating with each other.

It is used in case of plants and animals(here beetles) in which the without compatible sex organs individual of different species will not be able to mate and produce offspring.

Thus, the correct answer is option C

6 0
3 years ago
. A different runner trains for a marathon for 6 months by eating nothing but bags of french fries from McDonalds. They run a 10
Sladkaya [172]

Answer:

0.1m/s

Explanation:

The speed, which refers to how fast an object moves within a period of time, can be calculated as follows:

Speed (m/s) = distance (m)/time (s)

Based on the provided information in the question, distance = 10m, time = 100s

Hence, the speed will be:

Speed = 10/100

Speed = 0.1m/s

8 0
3 years ago
Plate divergence is best described as a/an _______ process.
givi [52]

Answer: Plate divergence is best described as a taphrogenic process.

Explanation:

5 0
3 years ago
Read 2 more answers
Why are graphs useful when interpreting data
denis23 [38]
They are useful cause you need to find the data with no graphs no data
6 0
3 years ago
Read 2 more answers
Most primates have
Black_prince [1.1K]

Answer:

b. nails instead of claws on their fingers and toes

Explanation:

Primates are a class of mammals in which humans are included. It is a very varied group, ranging from 30 gram lemurs to over 200 kg gorillas.

This group of animals is characterized, among other things, by having five fingers at its ends. They have clavicle, binocular vision, orbits surrounded by bone, etc. The vast majority have nails instead of claws, opposing thumb and vision that captures all colors.

Unfortunately, it is a very threatened order, as 60% of the world's primates could disappear within 25 years. This is all the fault of one species: the human.

7 0
3 years ago
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