Field mustard is an annual plant that grows wild in many regions of the world. It has small yellow flowers and is pollinated by insects. Field mustard has to flower and produce seeds to give rise to the next generation. Southern California experienced a severe drought between 2000 and 2004. Plants that flowered earlier reproduced. Those that flowered later died without producing seeds. This led to more early-flowering field mustard plants. This change in population characteristics took only a few generations.

How do you think scientists discovered that the flowering time of the field mustard had changed?

Answers

Answer 1

Answer:

Due to early flowering in the mustard plant.

Explanation:

The scientists discovered that the flowering time of the field mustard had changed by observing more mustard plants which produces earlier flowers. The behaviour of the mustard plant change due to the change that occur in the environmental conditions that leads to early flowering in mustard plant. If this early flowering occurs for more generation, then the mustard plant will adopt this type of behaviour in normal environmental conditions that experience by the mustard plant.


Related Questions



These celestial bodies are thought to originate from two different sources. Some are called long-period and originate from the Oort Cloud. These bodies orbit the Sun but may take as long as 200 years to complete one orbit. Others are called short-period and originate from the Kuiper Belt in our solar system. What is this celestial body called?

Answers

Answer:

Comets

Explanation:

Plants take energy
from the sun
and make food, which for plants is

Answers

Answer:

Photosynthesis

Explanation:

Plants use a process called photosynthesis to make food. During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch.

Answer:

[tex]\boxed {\boxed {\sf Glucose}}[/tex]

Explanation:

Plants (plus some bacteria and algae) are autotrophs and undergo a process called photosynthesis.

They obtain light energy from the sun and capture it using a green pigment called chlorophyll, water from the soil is drawn up through the roots with capillary action, and carbon dioxide diffuses into stoma on leaves.

Then, in the chloroplast, these substances are turned into oxygen and glucose. Both of these are used in cellular respiration, which creates energy for the plant to grow and carry out cellular and biological functions. Therefore, glucose is often called "food" for the plant.

A student is looking for evidence that spindle fibers are separating
chromosomes during cell division. Which cell is the student looking for
below?*

Answers

I believe the correct answer choice is 2

PLEASE HELP ASAP!!

1. Food that the small intestine did not absorb goes to the
________________________.


esophagus

large intestine

mouth

2. Nutrients are proteins, fats, carbohydrates, vitamins and _______________________.


minerals

homeostasis

calorie

Answers

1. Large intestine
2. Minerals

According to the results for Patient 1 shown above, which antigens were present in Patient 1’s blood? Check all (if any) that apply.
A antigen
B antigen
Rh antigen
The fisted answer is (B)
Patient 1 has Type ___ blood.

Answers

Answer:

A.

Explanation:

Patient 1 has Type A blood because agglutination occurs due to reaction with anti-B. We know that A blood group has antigen A and it is anti-B means that they attack on B type of blood cells while on the other hand, B blood group has antigen B and it is anti-A means that they will attack on the A type blood cells upon mixing. So according to the chart, there is nothing happens by reaction of the blood with anti-A whereas agglutination occur by reaction with anti-B so we can say that the patient has type A blood.

Answer:

B-

Explanation: Just took the assignment.


Which parental genotypes below would result in children who are all normal-vision daughters and all colorblind sons?

(XB-allele for normal color vision)
(Xb-allele for colorblindness)

A) xBxb and xBy
B) xBxb and Xby
C) xbxband XBy
D) xbxb and Xby

Answers

Answer:

Good morning ,

I have a question , what's does the Y stands for !

How does composting help a landfill?
C. it allows things to decompose over 100's of years
B. helps break down biomass
D. it does not help the landfill
A. it takes up a lot of space


pls help :))

Answers

Answer:

C

Explanation:

It doesn't take 100s of years to decompose biomass. Usually it takes less than a year. Not C

It should help the land fill: D is incorrect

Initially it probably does take up a lot of space or more than the results of composting. But that's not why you do it. You do it because eventually very little will be left and it makes wonderful fertilizer. A is a half truth.

I'd pick C

What are the benefits of Renewable Energy?

Answers

Answer:

Benefits of Renewable Energy

Generating energy that produces no greenhouse gas emissions from fossil fuels and reduces some types of air pollution.

Diversifying energy supply and reducing dependence on imported fuels.

Creating economic development and jobs in manufacturing, installation, and more.

Explanation:

Do your experiments suggest that mushrooms are decomposers (organisms that break organic matter down to simpler, inorganic matter)? Explain.

Answers

Answer:

Explanation:

As we know mushrooms help to decompose dead organisms, and it helps breaks down dead plants and or, dead animals so yes I would suggest that mushrooms are decomposers.

Mushrooms are decomposers because they are capable of breaking down dead and decaying organic matter into simpler and inorganic matter to synthesize their own food.

What are the advantages of Decomposers?

Decomposers are only living forms that are capable of converting organic matter into inorganic one which is easily consumed by the roots of plants for their metabolism.

Mushrooms form a web of mycelium that expands deep into the soil to decompose dead organic matter with the help of their unique enzymes.

It also plays a key role in nutrient recycling and makes nutrients available to plants in inorganic forms.

Therefore, it is well described above.

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I need help please!!!

Answers

Answer:

I think option all are correct

Do I have the right answers

Answers

Answer:

yes

Explanation:

just that anaphase is letter c

How do the two groups of peripheral nerves differ?

Answers

Answer: The central nervous system includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs.

Explanation:

A plant's life cycle alternates between
and
generations.

Answers

Answer:

The correct answer is - haploid gametophyte and diploid sporophyte.

Explanation:

All plant life cycle shows alternation of generation. A plant's cycle alternates between haploid and diploid generation. The haploid generation is called gametophytic generation whereas the sporophytic generation.

The multicellular haloid structure of plants called sporophytic generation and these undergo meiotic or reduction division to produce the spores. These spores give rise to a haploid multicellular structure called gametophytic generation.

When comparing data between two different groups,
A.
the middles of the data sets and the spreads around them should both be considered.
B.
the most frequently occurring values and the middle values should both be removed from the data sets.
C.
only the highest and lowest values of the data sets should be considered.
D.
only the average values of the data sets should be considered.

Answers

Answer: A.  the middles of the data sets and the spreads around them should both be considered.

Explanation:

When comparing data from two different groups, the most frequently occurring values should not be removed because they are most representative of the data and so will be very important in comparing the data.

The highest and the lowest values should not be the only data considered, indeed those should be the of lower importance than the values in the middles as the highest and lowest can sometimes be outliers.

Averages are good for summaries but shouldn't be the only things considered. The correct answer is therefore the first option that the middles and the spreads around the middle should be considered as these are more indicative of the groups.

Answer:

i got it right in study island

Explanation:

What caused the oxygen levels in Earth’s atmosphere to increase during the Precambrian time? Choose the correct answer.


Land plants evolved and released oxygen as they grew.

The chemical weathering of granite released large quantities of oxygen.

Oxygen dissolved in the ocean was released by osmosis into the atmosphere.

Cyanobacteria consumed carbon dioxide and released oxygen as a waste product.

Answers

The Precambrian era is said to have taken place during the early years of our planet. During this time, the levels of oxygen in the atmosphere were much greater than they are today.

This level of increased oxygen in the atmosphere is a direct result of the biological processes and the sheer number of certain organisms present in Precambrian-era oceans.

Though the options stated all depict ways in which oxygen entered the atmosphere during the Precambrian era, the increase of oxygen levels is credited to the cyanobacteria.

The cyanobacteria were among the few living organisms present on the Earth during this time. They are small algae that use photosynthesis to sustain themselves.

Photosynthesis is known to produce and release oxygen as a waste product. This and the vast number of cyanobacteria present at the time account for the increase in oxygen levels during this era.

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most serious plant - pathogen belongs to ?

Answers

Answer:

I believe the answer is fungi

Explanation:

It causes most plant sicknesses.

A scientist isolated a molecule with nucleotide bases A, C, G, and U and ribose sugars. What is it?

a. rna
b. an amino acid
c. glucose
d. dna
e. a fatty acid​

Answers

Answer:

The Answer is RNA.

Explanation:

Because RNA consists of four nitrogenous bases: adenine, cytosine, uracil, and guanine.  I am 100% sure that is the answer if it's wrong, very sorry.

Sea ice is difficult to measure from Earth's surface.

How do you think scientists measure it?

Answers

Answer: Arctic Sea ice extent is virtually impossible to accurately measure from the Earth's surface. Scientists use radiometry data and visible imagery collected from the satellites to determine the sea ice extent.

HOPE THIS HELPS

a leaf of potted plant kept in darkness for 48 hours with smeared with Vaseline jelly then exposed to sunlight for 8 hours explain why the test for starch in the relief was negative ​

Answers

Answer:

I don't know sorry dude

The process in which pebbles, sand, silt, or mud are dropped is called?

Answers

Answer:

sedimentary rocks

Explanation:

hope this helps

When the ventricles contract, the valve prevents blood flow from the:
A ventricle to atrium
B atrium to ventricle
C left ventricle to the right ventricle
D right atrium to the left atrium

Answers

the answer is A i think

AO3 – Analyse using table 1 the distribution of blood to the working muscles and other organs at rest and during exercise (4 marks)

Answers

Answer:

When at rest, most blood flows to other organs. But during exercise, most blood flows to the working muscles.

Use the drop-down menus to complete the statements.
When ammonia was waved at the
end, the earthworms reacted by quickly pulling back from the odor.
When ammonia was waved at the
vend, the earthworms showed no reaction or change in behavior.

Answers

Answer: 1 is anterior and 2 is posterior

Explanation:

edge 2021

Answer:

edge

Explanation:

1 anterior

2 posterior

Which organisms does the rabbit eat ?

Answers

Answer:

Plants /producers

Explanation:

Hope this helps and have a great day!!!!

Answer:

plants,broccoli,Brussels sprouts,seeds,roots etc.

Explanation:

I hope it will help u

mention the effects of radioactivity on the environment​

Answers

just like in humans, radioactive material can damage plant tissues as well as inhibit growth. mutations are possible due to damage caused to the DNA. radioactive material in soil can prevent nutrient from being taken in by plants, causing it to be infertile.

Arteries and veins are two important parts of the circulatory system. What is the relationship between arteries and veins?

A.
They work together to exchange gases.
B.
They work together to transport nutrients.
C.
They work independently to remove wastes.
D.
They work independently to relay messages.

Answers

Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

True or False? Organ systems work in isolation and do not work with other organ systems.

Answers

The answer is False. Nothing in an organism works in isolation

What is the difference between a guard cell and a white blood cell?​

Answers

Guard cells exist in plants while white blood cells exist in animals’ body.
Blood cells can guard body btw.

Guard cells are found in plants and white blood cells are found in animals.

What are guard cells?Guard cells are specialised plant cells that regulate gas exchange in the epidermis of leaves, stems, and other organs. They are created in pairs, with a stomatal orifice separating them.

What are white blood cells?The immune system's white blood cells, also known as leukocytes or leucocytes, are responsible for defending the body against both infectious diseases and foreign invaders. All white blood cells are created and developed from hematopoietic stem cells, which are multipotent cells found in the bone marrow. All parts of the body, including the blood and lymphatic system, include leukocytes.

Guard cells function to allow gaseous exchange and white blood cells are responsible for the functioning of the immune system.

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what is computer and what does it mean

Answers

Answer:

computer is an electronic device that takes in raw that ,process it and give meaning ful information

5. If the ecologist was being lazy and only
sampled the flowers near the road (Row J).
What would his estimate of the entire field be
based on Row J data? (Show work.)

Answers

Answer:

his estimate would be low

Explanation:

His estimate would be low because row j has a much lower flower count then the other rows leading to what would most likely a low count

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