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
Ugo [173]
3 years ago
15

Where do most phosphates and nitrates in the Chesapeake Bay come from?

Biology
2 answers:
Elanso [62]3 years ago
7 0
<span>According to the US Department of Agriculture, most phosphates and nitrates in the bay water come from agricultural runoff including fertilizer from lawns in the suburbs. The results were based on a multi-year study of population data and cropland data with a control group and a treatment group, excluding hurricanes.</span>
olganol [36]3 years ago
5 0

Answer:

C. Agricultural runoff

Explanation:

You might be interested in
As a fishery scientist, you notice that very few cod fish have been caught in the past year. You still see very young and larval
Trava [24]

Explanation:

1 Protection

2. Not getting caught for a few years

3 Deployment of Supervisors by the Government

8 0
3 years ago
The _______ modifies vesicles for export or use within the cell. endoplasmic reticulum mitochondria Golgi apparatus nucleus
Anastasy [175]
I believe the answer is Golgi Apparatus.
8 0
3 years ago
Describe the vascular system of plants. Include brief descriptions of the characteristics and function of xylem and phloem.
solong [7]

Answer:

The vascular tissue of the plants distributes water and nutrients, which guarantees a constant growth. Each newly formed cell needs to become the corresponding cell type in vascular tissue.

Explanation:

Like animals, plants need water and nutrients. While animals use a circulatory and digestive system to obtain and distribute nutrients, plants use a vascular system. This system absorbs water, vitamins and minerals from the soil and then transmits energy in the form of carbohydrates to the roots. The main components of the vascular system are the xylem and the phloem.

<u>Xylem</u> is a complex tissue formed by several cell types. Its function is the conduction of water and minerals from the root to the leaves. Among the cells that form this complex tissue differ:

- Conductive cells or tracheal elements: they are dead elements at maturity, they serve for vertical conduction and support

- Vessel members are observed in Angiosperms, the largest plant group with the most recent evolution; They are short, wide cells with thick secondary walls, they differ from tracheids because they are perforated elements.

- Storage elements: parenchymal cells, thick walls, secondary, can present crystals and other cellular contents.

- Support elements: fibers in the Angiosperms and fibrotracheids in Gymnosperms, elements of intermediate characters between the fibers and the tracheids.

<u> Phloem</u> cells conduct food (photosynthesis produced by photosynthesis) from the leaves to the rest of the plant. They are living cells at maturity and in histological preparations colored with Astrablue take the color blue. Phloem cells are located outside the xylem.

The sieve elements of this tissue are: the sieve cells in the Gymnosperms and the members of sieve tubes with their respective accompanying cells in the Angiosperms. The accompanying cells retain their nuclei and control the neighboring sieve tubes. Dissolved food, such as sucrose, circulates through the screened areas that connect these cells to each other.

Being a complex tissue, it also has parenchymal cells for storage and fibers and sclereids as a support.

4 0
3 years ago
Describe the effect of amanitin on the maximum elongation rate for the wild-type and modified RNA polymerases. Determine the rat
Ainat [17]

Answer:

Average max. elongation rate = modified RNA pol./ wild type RNA pol = 2/12 = 0.166 nucleotides per sec.

Explanation:

After treating the wild type and experimental RNA with amanitin solution, the amanitin actively binds to the active site of wild type RNA polymerase, inhibiting addition of nucleotides and also it interferes with the motility of RNA pol. along the DNA template, due to which their is a sharp decline in maximum elongation rate of mRNA. In case of experimental RNA polymerase, due to single base substitution the experimental strain is already having very low elongation rate, but binding of amanitin causes constraint on the motility of RNA polymerase through the DNA template, thereby decreasing the elongation rate. Average max. elongation rate = modified RNA pol./ wild type RNA pol = 2/12 = 0.166 nucleotides per sec.

3 0
3 years ago
An asynchronous clr' signal (multiple answers can be correct, select all that apply. you will get partial credit in case of miss
stiv31 [10]

Correct Question:

An asynchronous counter signal:

Answer:

overrides the clock-gated input signal(s).

Explanation:

An asynchronous counter signal normally overrides the clock-gated input signal(s).

An asynchronous counter is a type of counter whereby each flip-flop output serves as the clock input signal for the next flip-flop signals and preset can be used to override the clock-gated input signal(s).

7 0
3 years ago
Other questions:
  • The nurse is working in an antenatal clinic. what findings would the nurse report to the provider during the third trimester of
    13·1 answer
  • 7. Which of the following is NOT a form of absolute dating? (1 point)
    5·1 answer
  • The Monterey pine and the Bishop's pine inhabit some of the same areas of central California. The Monterey pine releases pollen
    5·1 answer
  • Terminal bronchioles, part of the conducting zone, give rise to respiratory bronchioles, which are part of the respiratory zone.
    12·1 answer
  • Even though natural gas is the cleanest of the fossil fuels, which of the following are problems with natural gas? Select
    9·1 answer
  • According to the principal of dominance, if a recessive gene for tallness is paired with another recessive gene for tallness, th
    8·2 answers
  • A species of mice can have long or short tails. If you crossed a male mouse which is heterozygous and has a long tail with a fem
    9·2 answers
  • ATP is called the energy currency of the cell because
    12·2 answers
  • Cell division by meiosis occurs in
    15·2 answers
  • Which of the following is NOT TRUE about cilia?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!