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12345 [234]
3 years ago
14

Which two characteristics are important for soil or land that is used for farming 2 answers

Biology
2 answers:
beks73 [17]3 years ago
3 0

Answer:

PH of soil

and chemical composition in the soil

tia_tia [17]3 years ago
3 0

Answer:

Flat or terraced land

Explanation:

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In the normal course of evolution and adaptation, what is the most likely way for wings to develop in a tetrapod (four-limbed or
serious [3.7K]

The correct option is this: The forelimbs (or possibly hind limbs) will be used for the new purpose of flight. This new function will arise through many gradual steps, and there will be aspects of the wing that reflect its history and are not perfectly suited for flight.  

Adaptation refers to the physical or behavioral traits that an organism develop in order to enhance its suitability to its environment. Evolution on the other hand is always brought about by natural selection; organisms that are well adapted to their environments are naturally selected to survive, reproduce and pass their beneficial traits to their offspring. This is a gradual process that occurs over a long period of time.  

For wings to develop in a four limbed organism, the organism has to start using the hind or the fore limbs for flight (New adaptive behavior). The genes that support this new behavior will be passed to its offspring and subsequent generations over a long period of time, until the wings are perfectly suited for flight.  

 

6 0
3 years ago
Restriction endonucleases are especially useful if they generate sticky ends. What makes an end sticky?
Mazyrski [523]

The question is incomplete as it does not have the options which are:

A) single-stranded complementary tails

B) blunt ends

C) poly-A sequences

D) 5' cap

E) interference

Answer:

A) single stranded complementary tails

Explanation:

Restriction endonuclease is the enzyme which cuts the DNA sequence in the internal sequence.

The endonuclease enzyme can cut the DNA sequence in a way that it can form the cuts with the single-stranded overhangs called sticky ends and without overhangs called blunt ends.

The sticky ends are produced when the enzyme makes cut at the single strand and then makes the cut at between the same base at the nitrogenous base. This type of asymmetrical cut forms the single-stranded overhangs which can form the complementary base pairs easily.

Thus, Option-A is correct.

5 0
4 years ago
At the source, sugars are: At the source, sugars are__________.
Alex_Xolod [135]

Answer:

d. Actively transported into the phloem

Explanation: Source is the place where sugar are been produced and are active transported to actively growing part of plants that requires it. The actively growing plants part that requires sugar are called sink.

Photosynthate the end products of photosynthesis is what is been loaded into the phloem through active transport and then moved to sink i.e plant part that requires the sugar through a process called translocation. The sink in plant includes the fruits, leaves for some vegetables,flowers for ornamental crop,too or tuber, rhizomes.

When the phloem cell is damage there is reduction in transport of photosynthate or accumulation in a particular part of plant.

Actively growing parts of plant have a high demand for sugar or sucrose than the old and weak parts of plants.

8 0
3 years ago
What is the main enzyme that catalyzes Transcription?
Neporo4naja [7]

Answer:

RNA Polymerase

Explanation:

I took a bio class last year

7 0
4 years ago
In times of stress the sympathetic nervous system stimulates the _____ which then secretes _____.
yawa3891 [41]
In times of stress the sympathetic nervous system stimulates the adrenal medulla which then secretes catecholamines. The catecholamines includes; Dopamine, epinephrine and norepinephrine. Catecholamines are made by nerve tissue, the brain, and the adrenal glands. They help the body respond to stress or fright and prepare the body for "fight or flight" reactions.
8 0
3 years ago
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