1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
spin [16.1K]
3 years ago
15

Which of the following is not true of conservation tiling? A. a method of cultivation in which residues from previous crops are

left in the soil B. residues are partially covering soil and helping it to hold seeds C. there are several types including no tilling D. over 70% of US farmland was planted using conservation tilling in the early 2000s E. all these are false
Biology
1 answer:
tester [92]3 years ago
6 0
<h2>D) is the correct option </h2>

Explanation:

  • Conservation tillage conserves soil by reducing erosion
  • In the Midwest, erosion by water is the primary concern, whereas western regions of the country are more susceptible to wind erosion
  • Soil erosion removes the productive layer of topsoil, reducing crop yields and land value
  • Soil removed from fields eventually ends up as sediment in streams, rivers, or lakes
  • Sediment collects in surface waters, reducing their water-holding capacity and some crop nutrients and pesticides attach to soil particles and are carried and deposited in waterways along with the soil
  • Conventional tillage, such as moldboard plowing, leaves the soil surface bare and loosens soil particles, making them susceptible to the erosive forces of wind and water
  • Conservation tillage practices reduce erosion by protecting the soil surface and allowing water to infiltrate instead of running off
You might be interested in
The capacity of organs to allow the body to cope with stress via extra, unused functioning ability is referred to as _____. orga
lorasvet [3.4K]
This reaction is fundamental to the body's endeavors to accomplish recuperation and resume homeostasis. With the loss of bulk, we lose this metabolic supply. 
Organ save alludes to the useful limit of our organs to help life. When we're youthful, our organs have ordinarily the limit that it takes to just capacity. Elements that pressure those organs, similar to disease, damage and lethality we experience in our surroundings (pesticides, and so on.), test the organs, but since they have generous hold, don't charge their cutoff points. As we age, this hold lessens, and the organs turn out to be genuinely worried by these same variables. We just don't ricochet back the way we used to.
3 0
3 years ago
Read 2 more answers
Why do resistant bacteria multiply faster after a patient has taken antibiotics compared to a healthy person who has not taken a
Alenkasestr [34]

Answer:

When patient takes in antibiotics the resistance bacteria gets a competitive survival advantage over the normal sensitive bacteria and hence grows faster.

Explanation:

  • Bacteria can acquire resistance by taking in plasmids containing MDR (Multi-Drug Resistance) gene cassettes. The MDR genes produces proteins that can:
  1. Render the antibiotic ineffective to act on its target by inducing chemical modifications on the drug.
  2. Promote efflux of the drug from the bacterial cell so that the drug cannot act upon its target.
  • When a healthy person ( having no prior exposure to the antibiotic) is infected by bacteria ( both sensitive and resistant varieties):
  1. A competition develops for the host cells and nutrients between the sensitive and the resistant variety.
  2. This mutual competition restricts either of the sensitive or resistant bacterial strain to grow profusely.
  • When a person (having prior antibiotic exposure), gets infected by bacteria ( both sensitive and resistant varieties) and is exposed to the same antibiotic:
  1. The sensitive variety, due to its sensitivity towards the drug, gets killed.
  2. The resistant variety, due to its MDR genes, bypasses the lethal effect of the drug and survives.
  3. These surviving resistant bacteria can now infect all the available host cells and utilise all the available nutrients without facing any competition and multiply rapidly.
4 0
3 years ago
PI 3-kinase:_________
lana [24]

Answer:

The correct answer is - option A

Explanation:

Phosphoinositide 3-kinases or PI-3 kinse, are enzymes involved in essential cellular functions such as the growth of the cell, proliferation, motility, differentiation, survival and intracellular movement, which in turn are plays role in cancer.

PI3-kinase with oncogene PIK3CA and tumor suppressor PTEN, is implicated in the insensitivity of cancer tumors.

Thus, the correct answer is option A)

6 0
3 years ago
Bacteria grow best in food that has a pH factor that is _____.
Andru [333]
Bacteria in general grow optimally when the pH is around 7 (5-9 let's say). That is not to say that there are not bacteria that grow in extremely acidic conditions, like in our stomach, or others in extremely basic conditions, like the conditions near volcanoes. Nonetheless, bacteria that grow in food prefer acidic environments over basic ones and usually cannot tolerate the acidity of fruits which is around 4 pH for the most acid ones. For example, stuff like milk and bread that have a pH from 5-6 are prime examples of food where bacteria would thrive. Thus, the correct answer would be b.
6 0
3 years ago
The fossil evidence found in these sedimentary layers BEST implies that A) invertebrates evolved into vertebrates. B) animals ev
masha68 [24]

The diagram is missing in the question. It can be found in the following link: <em>https://quizizz.com › admin › quiz › 566b055c5cbcd49e2dd0fed1 › earth.</em>

The fossil evidence found in these sedimentary layers best implies that animals evolved bony skeletons after shells

Explanation:

Fossil is not only describing when organism lived, but it also gives information about the “progression and evolution of life” on this earth over millions of years. Fossils also give information that previous life in earth is different from present life.

According to evolutionist around 500 million years ago complex internal skeleton organism came into existence. They told fish had firstly evolved and they dominated the sea. Fossilization is very rare process.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which is not an energy type<br>A.non renewable <br>B.valuable<br>C.renewable
    14·2 answers
  • Which of the following is he greatest distance?
    9·2 answers
  • The round third prong on a grounded plug ______.
    11·1 answer
  • In dominnt/recessive inheritance patter,s the dominant allele is always expressed when present. the recessive allele is only exp
    15·1 answer
  • A sperm cell and an egg cell combine to form a cell called a zygote. This zygote undergoes cellular division repeatedly to becom
    8·1 answer
  • How do unicellular organisms living in water control the entry/exit of water from their cells?
    9·1 answer
  • 2. One characteristic of all living organisms is
    9·2 answers
  • The reactions of lactate fermentation in muscle cells happen in the
    13·1 answer
  • DNA is-
    5·2 answers
  • Signals from the sense organs are interpreted by the cerebrum, autonomic nervous system, medulla, cerebellum?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!