Positive and negative punishment are meant to?

Sexual selection that occurs when male display certain trait that will attract a female to mate with them

sleet_krkn [62]

If the answer is true or false then it’s true

5 0

4 years ago

A foal from a red colored mother and a white colored father, has a light red coat. What are the likely genetics behind the foal’

kondaur [170]

Answer:

The likely genetics will be incomplete dominance for such a phenomenon.

Explanation:

Incomplete dominance occurs when the dominant allele is not fully or completely showing dominance over the recessive allele.

When parents with such alleles are crossed, the resulting offsprings will show a physical trait which is intermediate and different from both of the parents.

In the scenario discussed in the question, the red colored mother and the white colored father are producing offspring that have light red coat. This is because the red color is not completely dominant over the white color. Hence, an intermediate light red color is seen in the offspring.

4 0

3 years ago

Define embryonic stem cells. Explain the pros and cons of Embryonic Stem Cells

just olya [345]

Answer:

Embryonic stem cells are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo. Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells.

Explanation:

Adult Stem Cells

Embryonic Stem Cells

Induced Pluripotent Stem Cells

Pros

Trans differentiate and and reprogramming of these cells is possible but is not well studied

Thought to be less likely to be rejected if used in transplants

Success has already been demonstrated in various clinical applications

Can maintain and grow for 1 year or more in culture

Established protocols for maintenance in culture

ESCs are pluripotent cells that can generate most cell types

By studying ESCs, more can be learned about the process of development

Abundant somatic cells of donor can be used

Issues of histocompatibility with donor/recipient transplants can be avoided

Very useful for drug development and developmental studies

Information learned from the “reprogramming” process may be transferable for in vivo therapies to reprogram damaged or diseased cells/tissues

Cons

Limitations on ASC ability to differentiate are still uncertain; currently thought to be multi or unipotent.

Cannot be grown for long periods of time in culture

Usually a very small number in each tissue making them difficult to find and purify

Currently there is no technology available to generate large quantities of stem cells in culture

Process to generate ESC lines is inefficient

Unsure whether they would be rejected if used in transplants.

Therapies using ESC avenues are largely new and much more research and testing is needed

If used directly from the ESC undifferentiated culture prep for tissue transplants, they can cause tumors (teratomas) or cancer development

Methods for ensured reproducibility and maintenance, as differentiated tissues are not certain.

Viruses are currently used to introduce embryonic genes and has been shown to cause cancers in mouse studies

7 0

3 years ago

What is it about the life-cycle that makes cane toad populations successful?

Svetllana [295]

Cane Toads are very strong and adaptable, they are also poisonous throughout its life cycle, which is why they only have a few predators and have a life span of 10-15 years. Cane toads have poison glands, and the tadpoles are extremely toxic to most animals if consumed. They are productive breeders, they only need a small pool of water of almost any nature. The female cane toads can lay 8,000 to 35,000 eggs at a time and may produce two clutches in one year. The eggs will hatch within 24-72 hours and the tadpole stage may last from three to twenty weeks. Cane toads in the tropics grow really quick and may be sexually mature only within one year. Cane toads have been introduced to many regions of the Pacific and the Caribbean islands as a method of agricultural pest control because of their ravenous appetite, however, they are now considered pests and are dangerous to humans and animals, both wild and domesticated especially to dogs.

7 0

4 years ago

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landscape management attracts people to nature preserves and national parks what are the benefits to the wildlife in these areas

Ket [755]

Answer:

one benefits to wildlife in national and nature parks are, that there are is not hunting within the parks. not only does this protect the wildlife, it also sustains the balance of life. nature and wildlife parks allow a careful eye to be placed on the animals that are going extinct or are even victims of severe hunting. this allows this generation as well as their future offspring to be healthy and ensure safety. a benefit to the public would be the, scenic routes you can walk on a trail, besides walking and being outdoors, any contribution/ donations are ensured to go towards rehabilitation of the animals.

Explanation:

i made it up and it gave me 100%

3 0

3 years ago

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