Plz help fast. I really need help

Answer:

Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming as a crude extract of P. rubens. Fleming's student Cecil George Paine was the first to successfully use penicillin to treat eye infection (ophthalmia neonatorum) in 1930.

Explanation:

Answer:

Is that you?????

Explanation:

Answer:

Stem cells

Explanation:

Stem cells are immature or unspecialized cells

Neurons develop from unspecialized cells and unspecialized cells are stem cells.

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.

Stem cells are the body's raw materials — cells from which all other cells with specialized functions are generated. Under the right conditions in the body or a laboratory, stem cells divide to form more cells called daughter cells.

The cells of the bone marrow produce all of your healthy blood cells, including red blood cells, white blood cells, and platelets.

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Answer:

a, c, d,

Explanation:

they are more than genetic, and with that said, also cancels out b

Explanation:

Humans have selectively bred plants and animals for thousands of years including: crop plants with better yields. ornamental plants with particular flower shapes and colours. farm animals that produce more, better quality meat or wool.

Answer:

A cocoon is a protective casing that protects and shelters the silkworm while its transitioning from predators and other threats. Within the cocoon the silkworm transitions into a pupa, the pups is the stage between the larvae and adult moth. After two weeks the pupa finishes it's transition into a moth.

Answer:

The answer is

The digestive system prepares food for the cellular utilization.

I hope this might help u

Answer:

mold

Explanation:

Alexander Fleming was a Scottish physician and scientist. He was known for the development of penicillin.

Alexander Fleming discovered a type of mold that kills bacteria, which led to the development of Penicillin.

The mold created around itself a bacteria-free circle.

Fleming experimented further and named the active substance penicillin.

Answer:

Alexander Fleming discovered a type of mold that kills bacteria, which led to the development of Penicillin.

Explanation:

Answer:

The results of restoration of this kind can include improved habitats for fish, birds and other wildlife, protection against flooding, better water quality, enhanced recreational opportunities, and increased economic opportunities through activities such as commercial fisheries and tourism.

Explanation:

Answer:

D: genetic diversity allows for birds to produce an ideal number of eggs, which leads to stabilizing selection.

Explanation:

Genetic diversity allows for birds to produce an ideal number of eggs, which leads to stabilizing selection. The correct option is D.

The spectrum of various inherited traits inside a species is referred to as genetic diversity.

There would be many individuals with a wide range of different traits in a species with high genetic diversity. For a group of related species to adapt to changing environments, genetic diversity is mandatory.

Genetic diversity aids the populations to adapt to altering environments. More variation boosts the likelihood that some individuals in a population will have allele variations that are suited to the environment. Those people are more likely to survive and have children with that allele.

Birds can produce an optimal number of eggs due to genetic diversity, which leads to stabilizing selection.

Thus, the correct option is D.

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Answer:

B

Explanation:

i had that question

Explanation:

why u want to know why u disturb ur mind by things which are already written in books

Answer:

brain, spinal cord, and nerves

Explanation:

you could be meaning something else but this is what i was taught in anatomy

Answer:

They are the: Central nervous system,

Peripheral nervous system,

Automatic nervous system.

Answer:

Ao & oo

i don't really know if the answer is this....

Answer:

Oo

Explanation:

Answer:

I would say the main difference is their covering. Arthropods have an exoskeleton, which protect their soft bodies while echinoderms have living endoskeletons. Overall, arthropods are more closely related to nematodes than echinoderms.

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--Applepi101

Answer:

Si.

Explicación:

Sí, la célula es responsable del despliegue del material disuelto en las células con la ayuda de enzimas que se encarga de reciclar todos los materiales químicos disponibles. Los materiales tomados por la célula del entorno exterior se pueden descomponer en moléculas más pequeñas con la ayuda de enzimas que aceleran las reacciones químicas en la célula. Hay varias enzimas presentes en el citoplasma de la célula que realiza su función.

Answer:

Explanation:

cell that contains two complete sets of chrom ... reproduction of diploid 0rg~~-ms normally results in new 0rga~-~~ms that ... what would most likely happen if miis was not accompanied by cytoplasmic division .

Answer:

the same number of chromosomes found in the cells of the parent

Explanation:

Answer:

a. 50%

b.25%

c. 25%

d. Why is it impossible to have a tortoise shell male offspring? the x chromosome, a male can only have one copy of the allele - either B. orb, not both!

Explanation:

Alleles can be referred to as alternate forms of a gene. Incomplete dominance refers to two true-breeding parents crossed to give an intermediate phenotype.

The allele (B) produces black color but (b) produces a yellow color.  A heterozygote produces a tortoise shell color (Bb)

Cross a tortoise shell female with a yellow male.

     Bb x bb

Bb Bb bb bb

c.  Bb --- 50% tortoise shell color

a.  bb  --- 50% yellow color.

b. No black -- 0%.

d. The males offspring cannot be tortoise shell because they have just the one X chromosome on which this gene resides. So they are either black or yellow.

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Answer:

What are the statements

Explanation:

Answer:

chromosomes

Explanation:

Hope this helps

Answer:

Chromosomes

Explanation:

The one that makes up the genetic material is the chromosomes.

Answer:B

Explanation:

➜ Plants do not move. In a large plant body there are many dead cells like schlerenchyma which provide strength to the plant but do not perform any cellular function. As a result they requires less energy. Animals, on the other hand, need energy for different activities like movement or search or food. So, they require more energy.

➥ Plants have low energy needs as compared to animals because they do not move. Moreover, in a large plant there are many dead cells like sclerenchyma because of which they also need less energy.

Answer:

A typical neuron consists of a cell body (soma), dendrites, and a single axon. The soma is usually compact. The axon and dendrites are filaments that extrude from it. Dendrites typically branch profusely and extend a few hundred micrometers from the soma. The axon leaves the soma at a swelling called the axon hillock (the axon hillock also has the greatest density of voltage-dependent sodium channels. This makes it the most easily excited part of the neuron and the spike initiation zone for the axon) and it branches but usually maintains a constant diameter. At the farthest tip of the axon's branches are axon terminals, where the neuron can transmit a signal across the synapse to another cell.

In general, dendrites receive the electrical signal from other neurons, and this signal is transmitted over long distances from the axon.

Like all animal cells, the cell body of every neuron is enclosed by a plasma membrane, a bilayer of lipid molecules with many types of protein structures embedded in it. A lipid bilayer is a powerful electrical insulator, but in neurons, many of the protein structures embedded in the membrane are electrically active. These include ion channels that permit electrically charged ions to flow across the membrane and ion pumps that chemically transport ions from one side of the membrane to the other to generate the action potential that generates the electrical signal. They also have a highly developed synthetic apparatus for the production of neurotransmitters