Describe the cytological observation that suggests that crossing over occurs during the first meiotic prophase.

Answers

Answer 1

Answer:

Describe the cytological observation that suggests that crossing over occurs during the first meiotic prophase.

Explanation:


Related Questions

Living systems are made of complex molecules including carbohydrates, fats, proteins, and nucleic acids. Even though there are more than 100 elements known to exist, these molecules are comprised of only a few elements. What are these elements?

Answers

nitrogen, carbon, hydrogen, oxygen, phosphorous, and sulfur

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the Earth. As magma cools, solid rock forms. This rock contains substances from the interior of the Earth. Which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?

A fresh water
В. solar energy
C. metal ores
D. fossil fuels​

Answers

fossil fuels because near a volcano it is hot enough to be able to burn fossil fuels

???????????????????????

Answers

The second option. Jakes family went on a camping trip

Based on the pressure data shown in the weather map, in which area are you
most likely to see calm, clear weather?
1
B
1006
1040
1016
H
D 1020
10
2004
10:2
1000
A. A
B. B
C. C
D. D

Answers

Answer:

B

Explanation:

[tex]1006 \times 1040 \div 1016[/tex]

The function of the platelets is to:
A. Transport oxygen to the tissues.
B. Surround and consume harmful microbes.
C. Help repair tissue and close wounds both internally and externally.
D. Produce chemicals called antibodies.

Answers

Answer:

C.) Help repair tissue and close wounds both internally and externally

Explanation:

A.) is incorrect because oxygen is transported to tissues via haemoglobin located on red blood cells.

B.) is incorrect because deterimental microbes within the body are surrounded and consumed by phagocytes, a type of white blood cell.

C.) is correct because platelets help to close wounds by clotting the blood to prevent it from exiting the body.

D.) is incorrect because antibodies, proteins produced to combat harmful viruses, bacteria, etc., are created by B lympocytes, a type of white blood cell.

the luminosity of a star correlates most closely with the star’s

Answers

Answer:

The larger a star is, the more energy it puts out and the more luminous it is.

Explanation:

I hope that helps.

A hygrometer _____.


measures the mold spores in fresh food
measures the mold spores in fresh food

measures humidity, temperature, and dew point simultaneously
measures humidity, temperature, and dew point simultaneously

measures the bacteria count in fresh food
measures the bacteria count in fresh food

identifies food that has been subjected to irradiation
identifies food that has been subjected to irradiation

Answers

Answer:

The answer is measures humidity, temperature, and dew point simultaneously

Explanation:

It measures the humidity in an certain area of choice.

A portable electric hairdryer with a resistance of 15 ohms is connected to a 120 V outlet. What is the approximate current
in the circuit?
A.8А
B.15 A
C.180 A
D.105 A

Answers

A.8A
Hopefully it helps

How does limited stomach volume affect weight loss?

Answers

Answer:

it affects weight loss by limiting the amount your stomach can hold, there by lessening the amount you eat and how much turns into fat.

Explanation:

I hope this is what you were looking for

A drug that constricts blood vessels would have which of the following direct affects

Answers

Answer:

The constriction of arterioles increases resistance, which causes a decrease in blood flow to downstream capillaries and a larger decrease in blood pressure.

Explanation:

what does menaing of reporoducion​

Answers

Answer:

It is a biological process by which an organism reproduces an offspring who is biologically similar to the organism.

Explanation:

I hope I have cleared ur doubt if not do mention in comment

The chart below shows several species found in a pond ecosystem and the pH levels in which the species can survive. The normal pH
of the pond is 6.5.
If the pH of the pond fell to 5.5 due to acid rain, which of the species shown in the chart would die?
pH 6.5 pH 6.0 | pH 5.5 pH 5.0 | pH 4.5l pH 4.0
Trout
Bass
Perch
Frogs
Salamanders
Clams
Crayfish
Snails
Mayflies

Answers

Answer:

Clams and Snails

Explanation:

According to the chart, the pH required of these two species is higher than 5.5.

How would the role of gene expression in cells be best described?

Answers

Answer:

Gene expression is a strictly controlled process that allows a cell to respond to changes in its surroundings. It serves as an on/off switch for controlling when proteins are created as well as a volume control for increasing or decreasing the amount of proteins produced.

what climate zone has very little change in weather
A. Polar Climate Zone
B. Tropical Climate Zone
C. Temperate Climate Zone

Answers

Answer:

Temperate Climates

Explanation:

Temperate means the weather and temperatures remain mild withuot much change

Answer:

c

Explanation:

:D hope it helps

Which of the following will cause evolution to a population?

Answers

This might not help, but there are five fundamental factors that induce an allele frequency shift in a population, or a collection of interacting organisms of a same species, from one generation to the next. Mutation, genetic drift, gene flow, non-random mating, and natural selection are all examples of evolution.

Hope this helps :)

PLEASE HELP!
An air pressure gradients forms as the sun heats the air around an island. In which direction will the wind blow during the day?

A- from the island toward the ocean.

B- from the ocean toward the island

C- counterclockwise around the island

D- clockwise around the island

Answers

The answer is b
Because it makes sense

The wind will blow during the daytime in the direction from the ocean towards the island. This occurs due to the pressure gradient. Thus, the correct option is B.

How to determine the direction of wind?

During the daytime, the island gets heated up faster than the ocean as the heat in the ocean gets dissipated over a large area due to convection currents. Also, the specific heat of water is greater in ocean than that of island. Since the island is hotter than the ocean, there is a build up of low pressure area on the island as hot air rises, creating a low pressure.

On the other hand, there's a relatively higher pressure at the ocean resulting in the development of pressure gradient. The wind blows from a higher pressure area to a lower pressure area, therefore wind blows from ocean towards the island (sea breeze).

Therefore, the correct option is B.

Learn more about Wind here:

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What is a biome? Describe 2 biomes on the planet.

Answers

Explanation:

A biome is a large area characterized by its vegetation, soil, climate, and wildlife.

eg -Aquatic biomes include both freshwater and marine biomes.Grasslands are open regions that are dominated by grass and have a warm, dry climate.

As ocean water salt concentration increases, the _____.

Answers

Answer:

density will increase

Explanation:

salt concentration is the amount of salt contain in water furthermore if the salt concentration increases definitely the density will increase since sea water is denser than both fresh water and pure water

Discuss the importance of information transfer to living organisms

Answers

Answer:

Encoded within the DNA structure of genes are signals that specify where each protein molecule belongs. Thus, it is the transfer of information from one macromolecule to another that maintains the integrity and orderliness of living cells.

Explanation:

Correct me if I'm wrong(๑•﹏•)

Hope it helps(. ❛ ᴗ ❛.)

What causes pollution? How can we stop it?

Answers

Answer: Reduce or eliminate fireplace and wood stove use. by avoiding burning leaves, trash, and other materials. the cause of pollution is gas in factories which cause harm to animals and humans

Explanation:

I tried my best

Answer:

marry me ill tell ya

have a nice day

The absorptive state is regulated mainly by insulin, whereas the postabsorptive state is regulated by multiple hormones.
a) true
b) false

Answers

The statement "The absorptive state is regulated mainly by insulin, whereas the postabsorptive state is regulated by multiple hormones." is a true statement.

Option A is correct

What is the absorptive state?

Generally, After a meal, your body is in the absorptive state, or fed state, where it is digesting the food and absorbing the nutrients.

In conclusion, insulin regulates your absorptive state or state of digestion

Read more about Digestion

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Does anybody know if its scientifically proven that people's eyes can betray emotion?

Answers

Answer:yes peoples eyes can betray your emotions...

Explanation:

eye movements can both reflect and influence higher mental functions such as memory and decision-making, and betray our thoughts, beliefs, and desires.

Which statement can best be supported by the picture of embryos

Answers

Answer:

I belive your answerr would be D

Explanation:

Choice A

Explanation: it’s the one that makes the most sense, all the others look wrong and statements don’t match with the picture provided( at least I hope so !)

PLS HELP
which structure is the human body function most like the cell wall in plant cell?

A. Bones
B. Intestines
C. Veins

Answers

Answer:

It's bones my dear i hope this helps you

Explanation:

A horticulturalist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R(RR and Rr) and the trait of white flowers is governed by the allele r(rr).

The horticulturalist plans to cross a geranium that is true-breeding for red flowers with a geranium that is true-breeding for white flowers.

Which Punnett square best describes this cross?


R r
R RR Rr
r Rr rr


r r
R Rr Rr
r rr rr


r r
R Rr Rr
R Rr Rr





























Birth and Death rate table. In year 0, birth rate is 0.25 and death rate is 0.5. In year 1, birth rate is 0.3 and death rate is 0.4. In year 2, birth rate is 0.4 and death rate is 0.2. In year 3, birth rate is 0.5 and death rate is 0.15. In year 4, birth rate is 0.5 and death rate is 0.2. In year 5, birth rate is 0.4 and death rate is 0.3.

a graph showing birth and death rates per thousand people from pre-industrial to post-industrial times

Illustration of food web including a relationship between green plants, a mouse, a rabbit, a goat, an owl, a snake, a wild cat, a jackal, a kite, and a lion.

Four graphs A, B, C and D. Each graph is a line that occupies a square. The left and right sides of the graph touch the x axis. Each graph has a different shape, but the space under the line remains the same. Graph A. Solid line symmetrical bell-shaped curve. Graph B. Dotted line symmetrical bell-shaped curve superimposed on a solid asymmetrical curve that leans to the right of the dotted curve. Graph C. Dotted line symmetrical bell-shaped curve superimposed on a solid curve. The solid curve is symmetrical. It goes up on both ends to form two humps and it is lower in the middle. The solid curve looks like the letter M. Graph D. Dotted line symmetrical bell-shaped curve superimposed on a symmetrical curve that is narrower and taller than the dotted line curve.

A phylogenetic tree showing the evolutionary relationships between, from left to right, proteobacteria, chlamydia, spirochetes, gram-positive bacteria, cyanobacteria, euryarchaeota, crenarchaeota, diplomonadida, parabasala, euglenozoa, alveolata, stramenopila, rhodophyta, chlorophyta, plantae, mycetozoa, fungi, and animalia

Tree diagram with five levels, showing genetics of Darwin finches. Starting from bottom, level one shows Common ancestor from South American mainland. Level two shows Ground, Tree, and Warbler finches with their Genuses as Geospiza, Camarhynchus, and Certhidea respectively. Level three shows Seed eaters, Sharp-beaked ground finch or G difficilis, Cactus flower eaters, Bud eater, and Insect eaters. Level four shows Large ground finch or G magnirostris, Small ground finch or G fuliginosa, Cactus ground finch or G scandens, Small tree finch or C parvulus, Medium tree finch or C pauper, and Woodpecker finch or C pallidus. Level five shows Medium ground finch or G fortis, Large cactus ground finch or G conirostris, Vegetarian finch or C crassirostris, Large tree finch or C psittacula, Mangrove finch or C heliobates, Green warbler finch or Certhidea olivacea, and Gray warbler finch or Certhidea fusca.

A diagram of the cycle of photosynthesis and cellular respiration, with the steps labeled A, B, C, and D.

Stage of mitosis showing split chromosomes and the sister chromatids on the opposite poles of the cell

Assessment navigation

Answers

Answer:

Age 1940 Proportion 1970 Proportion 2000 Proportion

Under 1 year 0.015343 0.017151 0.013818

1 - 4 years 0.064718 0.067265 0.055317

5 - 14 years 0.170355 0.200506 0.145565

15 - 24 years 0.181677 0.174406 0.138646

25 - 34 years 0.162066 0.122569 0.135573

35 - 44 years 0.139237 0.113614 0.162613

45 - 54 years 0.117811 0.114265 0.134834

55 - 64 years  0.080294 0.091480 0.087247    

65 - 74 years 0.048426 0.061195 0.066037

75 - 84 years  0.017303 0.030112 0.044842

85 and over  0.002770 0.007435 0.015508

All ages 1.000000 1.000000 1.000000

Hope i helped if not tell me ~Ally

Which resource is a nonrenewable resource? fresh water,maple trees,solar energy,precious metal

Answers

Precious metal. All the others are renewable.

The only resource that is non renewable is : Precious metal.

Meaning of Non renewable resources

A non renewable resource as the name implies is an resource that can not be renewed. restored, or regained when used up. It is a  resource that depletes as is been used continuously until it goes on extinction. Precious metals are non renewable because they cannot restored or regained when used up.  While

Non renewable resource has a limit to its usage because they can go on extinction.

in conclusion, The only resource that is non renewable from the list given is Precious metal.

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13. What is the maximum total number of ATP molecules formed during anaerobic cellular respiration

Answers

Answer:

the maximum total number of ATP molecules format during anaerobic cellular respiration is 2ATP

In nature, which pigment gives red algae it’s color?

Answers

Answer:

Red algae are red because of the presence of the pigment phycoerythrin; this pigment reflects red light and absorbs blue light.

Answer:

i believe the answer is phycoerythrin and phycocyanin

Explanation:

Most scientists think that Earth goes through natural cycles of warming and cooling. How is the current trend in temperature change different from the natural cycles in the past?
A.
The rise in average temperature is happening faster than before.
B.
The variation in average temperature is happening more slowly than before.
C.
The average temperature has remained constant for hundreds of years.
D.
The average temperature varies up or down from year to year.

Answers

A aaaaaaaaaaaaaaaaaaaaaaaa

I need help with this

Answers


1-interphase
2-C
3-Cytokinesis
4-centrioles
5-G1 phase. Metabolic changes prepare the cell for division.
S phase. DNA synthesis replicates the genetic material.
G2 phase. Metabolic changes assemble the cytoplasmic materials necessary for mitosis and cytokinesis.
M phase. A nuclear division (mitosis) followed by a cell division (cytokinesis).
6-The cells are animal cells because they have a round shape and the cell membrane pinches in to form two cells.
B-Animal cells, as they have centrioles.
7-Interphase is the longest
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