BIOLOGY HIGH SCHOOL

Are viruses alive? The scientific debate continues. Viruses exhibit some characteristics of life, but others are missing. The MOST obvious reason why scientists still refer to viruses as non-living is that they
A) do not change over time.
B) do not contain any genetic material.
C) are much smaller than anything alive.
Eliminate
D) are not composed of one or more cells.

Answers

Answer 1
Answer: B) do not contain any genetic material. 

There is still an ongoing argument between scientists whether viruses are alive or not. Viruses are a tricky microorganisms that when outside a host is like a non-living organism but when attaches to a host becomes alive. 
Answer 2
Answer:

The correct answer is D.} Are not composed of more than one cells.

Related Questions

The variation of kernel color in corn plants is an inherited trait. R is the dominant allele for red kernels in a corn plant and r is the recessive allele for yellow kernels. What is the probability that a corn plant with the genotype Rr crossed with a corn plant rr will have offspring with the genotype rr? Express your answer as a fraction using numerals for numbers and / for the fraction bar. Do not include spaces.
Many cacti, such as saguaros and barrel cacti, have large stems and no leaves. What function of leaves is taken on by the stems of such cacti?
Blood cells are produced in which system?a. circulatory systemb. immune systemc. skeletal systemd. endocrine system
Which base is found only in DNA? adenine guanine cytosine thymine
Which best describes probability

Tsar Nicholas II and Tsarina Alexandra were the Romanov rulers of Russia when the Bolshevik revolution took place in 1917. During this revolution, Tsar Nicholas II was overthrown, and the majority of his family members were killed. The remains of two of the Tsar and Tsarina’s children, Alexei and Anastasia, were never found. Suppose two people came forward who claims to be the missing Romanovs. Which technology could only be used to identify Alexei? DNA technology STR analysis mtDNA analysis Y-chromosome analysis

Answers

Answer:

Option D, Y-chromosome analysis

Explanation:

In this technique, DNA is analysed in a way to study the hierarchical progression of Y chromosomes in the males . This methodology help in identifying the family background of any individual based on his/her gene analysis.

The Y chromosome is passed on from one generation to another  in sons as sons have one Y chromosome and one X chromosome while daughters have two X chromosome one from the father and the another one from the mother.

It is convenient to study the Y chromosomes in male to identify the family background.

Hence option D is correct

D. Y-chromosome analysis 
Hope this helps!! :)

Which is a density-independent factor limiting population growth

Answers

A density independent factor limiting population growth would be earthquakes because it is not dependent on the size of a specifies or population in a certain area. An earthquake can occur and harm a small population or a big one.

Answer:

volcanic eruption

Explanation:

The type of epithelium that contains two or more layers of epithelial cells is

Answers

Answer:

The type of epithelium that contains two or more layers of epithelial cells is called stratified epithelium...

Explanation:

The type of epithelium that contains two or more layers of epithelial cells is called stratified epithelium.

Stratified epithelium is a type of tissue that consists of multiple layers of epithelial cells. These cells are stacked on top of each other, with the bottommost layer in direct contact with the underlying connective tissue. The cells in the basal layer are usually cuboidal or columnar in shape, while the cells in the outer layers can be squamous, cuboidal, or columnar, depending on the specific type of stratified epithelium.

Pea plants can have yellow seeds or green seeds. Which conclusion about the meaning of Y is correct if the allele combination Yy is for yellow seeds?

Answers

Answer:

yellow and dominant

Explanation:

In genetics, complete dominance occurs when a gene variant referred to as 'dominant allele' completely masks the expression of another allele referred to as 'recessive allele' in heterozygous individuals (i.e., individuals carrying one copy of the dominant allele and one copy of the recessive allele) at a specific locus. In this case, the yellow (Y) allele is dominant for the trait of 'color seed' with regard to the recessive (y) allele, which is responsible for the phenotype of green seeds, and therefore heterozygous individuals (Yy) will have yellow seeds.

Several hours following death the muscles of the body stiffen, a condition commonly referred to as rigor mortis. What is the cause for the stiffened muscles?Myosin heads are not attached to actin filamentsMyosin heads are attached to actin filamentsActin degenerationMyosin degenerationBuild up of ATP due to lack of circulation

Answers

Answer:

Myosin heads are attached to actin filaments

Explanation:

During the process of muscle contraction, myosin heads are attached to actin filaments. ATP is necessary for their release and for the muscle relaxation.

In rigor mortis, myosin heads continue binding with the active sites of actin proteins. This occurs because after death, there is no production of ATP and consequently, the muscle is unable to relax until further enzyme activity degrades the complex.

Removing wastes from the body is called _____.a.
exhalation.
b.
excretion.
c.
respiration.
d.
none of the above.

Answers

excretion is process of removing waste from the body.
The answer is b. excretion. Excretion means to remove waste from your body.
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Scientists use the scientific method in order to: (select all that apply) answer questions. provide an objective, standardized approach to experimentation. generate evidence to support their arguments. minimize prejudice or bias in the experimenter.
A certain plant has a color that can range from green to yellow. Some plants are very green, and some are very yellow, but most are in between. What is most likely true about this trait? A. The color is a Mendelian trait. B. There are only two alleles for color. C. Being yellow is a recessive trait. D. There are several genes that control the color.
This is a radio astronomy observatory located on the Plains of San Agustin consisting of twenty-seven independent antennas, each of which has a dish diameter of 25 meters.