Why is crossing-over important?

It completes Meiosis II.

It ensures that each gamete receives identical genes.

It creates new DNA.

It creates genetically unique gametes.

Answers

Answer 1

Answer:

I think 4th option is correct

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Related Questions

Summarize the features of a safe and sanitary composting facility. Explain the role played by each feature. (Not Multiple Choice, pls answer quickly!)

Answers

Given what we know about sanitary procedures, we can confirm that the features of a safe and sanitary composting facility lie in proper employee hygiene.

The most important part in limiting the pathogenic impact of compost is that of employee hygiene, which includes:

Thorough hand washing after handling compostKeeping the compost free of dust Keep any and all cuts covered at all timesThe employees must have proper vaccination protection before handling compost.

These are the features of a safe and sanitary composting facility and their role is to limit the effect and spread of pathogens that may result from the build-up of compost.

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. Why are cellular respiration and photosynthesis considered almost opposite processes?
A. Photosynthesis releases energy, and cellular respiration stores energy.
B. Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back.
C. Photosynthesis produces excess water, and cellular respiration uses water.
D. Photosynthesis removes oxygen from the atmosphere, and cellular respiration puts it back.

Answers

Answer:

B. Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back.

air is made of ____and ____​

Answers

Answer:

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

Answer:

air is made of nitrogen and oxygen

What do all living things have in common?

All have cells with a nucleus.
All have a genetic code.
All are made of two or more cells.
All can perform photosynthesis.

Answers

Answer:

All are made up of two or more cells

How do the baby’s respiration and circulation change when the baby is born?

Answers

Answer:

Oxygen and carbon dioxide flow through the blood in the placenta. Most of it goes to the heart and flows through the baby's body. At birth, the baby's lungs are filled with fluid. ... Increased oxygen in the lungs causes a decrease in blood flow resistance to the lungs.

give a scientific explanation of evolution​

Answers

Explanation:

according to DARWIN'S theory, evolution is derived from the parent's philosophy. meaning, the parents are offspring from an animal that mated with an (updated) version of that species...

What is diabetes insipidus? How would the urine of someone with diabetes insipidus compare to that of someone with diabetes mellitus?
help plz​

Answers

Answer:

In diabetes mellitus, the level of glucose in your blood, also called blood sugar, is too high. Your kidneys try to remove the extra glucose by passing it in your urine. In diabetes insipidus, your blood glucose levels are normal, but your kidneys can't properly concentrate urine.

Explanation:

Explanation:

 In diabetes insipidus, your blood glucose levels are normal, but your kidneys can't properly concentrate urine.

Which of the following characters can NEVER be an adaptation?

Answers

Answer:

ahh......

where r the options??

You are competing at a high school gymnastics meet. Your floor routine music begins
and you start running in a positive direction into a tumbling pass, starting from rest.
At 2s, your velocity is 4.5m/s. Calculate your acceleration.
Your Answer:
Answer
units

Answers

Answer:

2.25 m/s^2

Explanation:

Acceleration is the speed which you are increasing by per second. Therefore to find acceleration all you need to do is divide the change in velocity (4.5) by the time (2). Your units than become (m/s)/s or m/s^2.

Osteoporosis is more prevalent among women than men because women generally
have more bones in their bodies than men have.
take in more calcium than men take in.
have lower bone mass than men have.
exercise more than men do

Answers

Answer:

Have lower bone mass than men have

Explanation:

Osteoporosis is a bone thinning disease that is more prevalent among women than men and typically occurs after 50. The reason women are more likely to get the disease than men is because after 50 many women have gone through or are going through menopause. Menopause causes the ovaries to produce less estrogen which is what had previously been promoting bone density.

The other answers are incorrect because...

A: have more bones in their bodies than men have: for the most part everyone has the same amount of bone in there body (although there are diseases that cause a persons bones to fuse together making them have fewer bones than the average person)

B: take in more calcium then men take in: more calcium would actually cause someone to be less likely to get osteoporosis because it strengthens the bones.

C: exercise more than men do: Osteoporosis is more common in malnourished women and women who do not get regular physical activity to strengthens there bones. So getting more exercise would actually lessen the chance of getting osteoporosis.

Hope this helps! :)

Please answer

Right the kingdoms for different categories for example if eubacteria is prokaryotic or eukaryotic.

Answers

Eubacteria: Prokaryotic - Single Celled - Consumers

Protista; Eukaryotic - Multicellular - Consumers

Fungi: Eukaryotic - Multicellular - Consumers

Plantae: Eukaryotic - Multicellular - Producers

Animalia: Eukaryotic - Multicellular - Consumer

Thinking of your own energy use, list some ways you use energy every day. Are there ways you could reduce your energy use?

A sample answer can include the following:

Use:

Cooking
Driving a car
Using a cell phone
Watching television
Using a computer
Powering indoor lights/lamps
Powering indoor heat/air conditioning
Washing and drying clothes
Ways to reduce:

Adjusting heat/AC levels when house will be empty
Driving car less, biking or walking more
Turning off lights and appliances when finished
Hanging clothes outside to dry

Answers

Use - drying hair , washing and drying clothes , using lamps , air conditioners
You could save energy by allowing hair and clothes to air dry , opening windows and turning air off on mild days , this would also help with decreased use of lamps and lighting by allowing natural light in .


Into which part of the bacteria cell is the human gene for insulin inserted?

Answers

Answer:

plasmid

Explanation:

plasmid

The human insulin gene is inserted into each plasmid. The plasmid acts as a vector - it is used to transfer DNA from one organism to another. Bacterial cells are made to take up the genetically modified plasmids.

Assume that a cross is made between tall and dwarf tobacco plants. The F1 generation showed intermediate height, whereas the F2 generation showed a distribution of height ranging from tall to dwarf, like the original parents, and many heights between the extremes. These data are consistent with _____________ inheritance

Answers

U find out your self

The Forensic Anthropology Facility was founded by whom?

Answers

was found in 1981 by anthropologist William Bass to research human decomposition and insect activity.

Plants lose __ % water to transpiration resulting in 10% increase in atmospheric water vapor which increases relative humidity and chance of precipitation.

A: 90
B: 10
C: 100
D: 45​

Answers

Answer: A

Explanation: Transpiration is the loss of water from the plant through evaporation at the leaf surface. It is the main driver of water movement in the xylem. Transpiration is caused by the evaporation of water at the leaf–atmosphere interface. Up to 90 percent of the water taken up by roots may be lost through transpiration as only a small amount of that water is used for growth and metabolism.

Which of the following explains how rumen biotechnology improves feed for ruminant animals?
by identifying small amounts of bacteria from tiny samples of meat
by boosting the bioavailability of carbohydrates and protein in plants
O by helping animals grow larger more quickly and produce cleaner meat
O by screening animals for physical defects and certain diseases

Answers

Rumen biotechnology improves feed for ruminant animals by boosting the bioavailability of carbohydrates and protein in plants. It can be used to improve the nutritive value of ruminant feedstuffs.

Rumen biotechnology refers to the use and management of the techniques of forestomach fermentation in order to improve the efficiency of ruminant production.

Rumen biotechnology can be used to improve the amount as well as the availability of macronutrients (i.e., carbohydrates and proteins) in plants.

However, this technology (rumen biotechnology) exhibits several limitations mainly associated with the identification of bacterial strains used during inoculation, proteins (recombinant enzymes) and genomic stability of the genetic constructs.

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Why does flask 3 results not disprove spontaneous generation?

Answers

Answer:

because one would think that the microorganisms suddenly and spontaneously grew out of nothing

Explanation:

A student named Janine says that the measure of side b is 64 ft. Please state whether this is correct or incorrect. If this is incorrect, state the length of b. Explain your answer in complete sentences. Use vocabulary such as Pythagorean Theorem, side, hypotenuse, square root etc.

Answers

The measure of side b as 64 ft is incorrect. The accurate measure would be 8 ft.

According to the Pythagorean theorem, the square of the hypotenuse of a right-angle triangle is the sum of squares of the opposite and the adjacent sides. Mathematically:

[tex]hypotenuse^2 = opposite^2 + adjacent^2[/tex]

In this case, the hypotenuse = 10 ft, the opposite = 6 ft and the adjacent = b

Hence,

b^2 = 10^2 - 6^2

       = 100 - 36

          = 64

b = √64

     = 8 ft

Thus, the side b is 8 ft and not 64 ft.

More on the Pythagorean theorem can be found here: https://brainly.com/question/16426393

Which bacteria are useful in converting milk into curd?
(A) Azotobacter
(B) E. Coli
(C) Lactobacilli
(D) Pseundomonas​

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The correct Choice is ~ C

Lactobacillus bacteria are useful in converting milk into curd ~

Answer: (C) Lactobacilli

Brainliest pls if correct!

Select the correct answer.
Which of the following bacteria is found on human skin?
OA. Shigella
OB.
Escherichia coli
O C. Staphylococcus aurea
OD.
Salmonella

Answers

Answer:

The answer is C.

From the following mRNA sequence organized into triplets:
5' ACC AUG UCC ACA UUC CCA GUG CUU CGG GAA GAU AUC CCG CUA AGA GAG AGA CAU GUC AAA GAG GCU GCU GCU GCU GCU GCU GCU GCU GCU GAG CAU CGG CGG CGG GAC AUG GGC AUC CAA GGA GCC GCU UCG GCC GCC ACG GUG CCG CCC CAU CAA UGC CAC CCU GGC UGU GGA GAA GGA GGG GGG CUG CCC UAG GUG 3'

1. Identify start codon
2. translate sequence to proteins
3. identify the base dna sequence

Answers

Answer:

Most likely 2

Explanation:

Have a great day

What are some of the differences between Eukaryotic and Prokaryotic gene expression? I need several answers.

Answers

Answer:

Prokaryotic

Nucleus is absent

Membrane-bound nucleus absent.

One chromosome is present, but not true chromosome plastids

Unicellular

Lysosomes and Peroxisomes absent

Microtubules absent

Endoplasmic reticulum absent

Mitochondria absent

Cytoskeleton absent

Ribosomes smaller

Vesicles present

Golgi apparatus absent

Chloroplasts absent; chlorophyll scattered in the cytoplasm

Submicroscopic in size Flagella is present and made up of only one fiber

Cell wall chemically complexed

Vacuoles absent

Permeability of Nuclear membrane is not present

Sexual reproduction is absent

Endocytosis and exocytosis are absent.

It may have pili and fimbriae.

Eukaryotic

Nucleus is present

Membrane-bound Nucleus is present.

More than one number of chromosomes is present.

Multicellular

Lysosomes and Peroxisomes present

Microtubules present

Endoplasmic reticulum present

Mitochondria present

Cytoskeleton present

Ribosomes larger

Vesicles present

Golgi apparatus present

Chloroplasts present in plants

Microscopic in size, membrane-bound

Cell wall is present in plants and fungi and chemically simpler

Vacuoles present

Permeability of Nuclear membrane is selective

Sexual reproduction is present

Endocytosis and exocytosis occurred

Pili and fimbriae are absent

how can natural disasters hurt the balance between biotic and abiotic elements??? I need an answer soon pleaseeeee!!! I know how it would affect the biotic and abiotic elements but the balance?!?

Answers

Answer:

Earthquakes, landslides, volcanic eruptions and natural bush fires all affect the many different ecosystems on our planet. Initially, these disasters negatively affect the biodiversity of wetlands, forests and coastal systems by causing the spread of invasive species, mass species mortality and loss of habitat.

Say that you look at the nuclei of 100 skin cells taken from the same person. About how many of these skin cells would you expect to be in interphase

Answers

Answer:

45 cells would be in the interphase

In the nuclei of 100 skin cells. The number of skin cells would be in interphase is 45.

What are cells?

Cells are the key unit of living organisms. The cell divides into many cells through the process of cell division.

Prokaryotic cells are the primitive type of cells that are present only in unicellular organisms, and they do not undergo cell division. These cells do not have true cell organelles and a nucleus, in that DNA is present in coil form in the cytoplasm. They contain ribosomes the organisms are bacteria that contain prokaryotic cells.

Eukaryotic cells are higher cells that contain cell organelles they have to perform various complex functions of large organisms. They have a nucleus which contains DNA or genetic material, it does not have flagella.

Therefore, the number of skin cells in the interphase is 45 cells.

To learn more about cells, refer to the link:

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can some one help me with this please​

Answers

Answer:

7 answer is b

8 answer is d

9 answer is a

Explanation:

Answer:

B

D

A

Explanation:

:)

Why is grafting considered asexual reproduction and not sexual
reproduction?

Answers

Answer:

The reason that grafting is not considered sexual is because there is no conjoining of male and female germ cells. (there is no germination like how sperm and egg cells do). So its considered asexual

Explanation:

an extensive study was conducted on identical twins that were separated at birth. the study showed that the individual from each pair who recieved better nutritionduring childhood scored higher on standardized tests. this can best be described as an example of how

Answers

Answer:

why did they do it because its bad a

As soon it cut a piece of an outdoor potted plant and brings it inside and place is it in a vase. A few weeks later, the student notice is that not only is a plant so alive, it has roots. The student plans this cutting into a pot with soil, and he grows along side the original point where it came from. Which explanations best match with the description an image shown here in the scenario? Select all that apply.

Answers

Answer:

If its on usa test prep it would be

A) The new root growth is a result of meiosis

B) the new plant formed from as reproduction

D) The new plant is genetically identical to the original plant.

The new plant grows vegetatively from the cutting and will look exactly like the original plant.

Vegetative propagation

Cutting is a form of vegetative propagation attribute of some organisms.

Cutting a tissue off a plant and the tissue developing its own root to become a new plant happens by mitosis.

Mitotic division of the cut tissues leads to the formation of roots and the eventual growth to a new plant.

Mitotic growth means that the new plant will be genetically and physically identical to the parent plant, provided they grow under the same conditions.

More on vegetative propagation can be found here: https://brainly.com/question/1213600

Chemicals that help chemical reactions occur faster rates in living organisms are known as

Answers

The called enzymes that sped up chemical reactions
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