BIOLOGY COLLEGE

True or False: All viruses look the same. А True B False​

Answers

Answer 1
Answer:

Answer:

B False​

Explanation:
Answer 2
Answer:

Answer: False

It is not true

Related Questions

Which two parts of sedimentary rock formation include the breakdown and carrying away of existing rock?cementation and erosioncompaction and cementationdeposition and compactionerosion and weathering
A)What effect does high temperature have on radish germination independent variable ​
Explain three ways of classifying Vertebrates​
Most people feel confident that they could identify a living thing from a nonliving thing, but sometimes it’s not so easy. Scientists have argued for centuries over the basic characteristics that separate life from non-life. Some of these arguments are still unresolved. Despite these arguments, there do seem to be some generally accepted characteristics common to all living things. Anything that possesses all these characteristics of life is known as an organism. 1.The scientific term for a living thing is a(n) _____________________
Each ____ on a chromosome contains the information to code for one specific protein

In prokaryotes, a search for genes in a DNA sequence involves scanning the DNA sequence for long open reading frames (that is, reading frames uninterrupted by stop codons). What problem can you see with this approach in eukaryotes?

Answers

Answer:

DNA in eukaryotes have introns which are the non-coding sequences and are spliced out of primary transcript. They are not present in mature mRNA.

Explanation:

The reading frame of 50 or more nucleotides without any termination codon in between is called an open reading frame. The long open reading frames mostly represent protein-coding genes.

Hence, long open reading frames are searched for in order to find the genes. The presence of introns in eukaryotic DNA does not allow the application of this approach to find genes in eukaryotes.

The post-transcriptional modification of the primary transcript removes the introns. Hence, a mature mRNA does not have introns. Therefore, introns do not contain open reading frames.

In humans there is a dominant allele (A) for the absence of moles; while the recessive allele (a) results in the presence of moles. A couple who are both heterozygous for this locus (Aa) plan to have seven children. a. Expand the binomial (p + q)7.
b. What is the probability that:
(i) The first child that is born will not have moles.
(ii) All of the children will have moles.
(iii) The first two children will have no moles and the last five will have moles.
(iv) Of the 7 children, 4 will have no moles and 3 will have moles
c. Assume this couple now have two children, one with moles and one without moles. What is the probability that the child born without moles is a carrier of the a-allele (ie heterozygous)?

Answers

Answer:

a. (p + q)^7 = p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7

b. i. 0.75

   ii. 0.000061

   iii. 0.012

   iv. 0.17

c. 0.67

Explanation:

a. The expansion of the binomial (p + q)7 would be such that:

(p + q)^7 = p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7

b. Both couples are heterozygous:

             Aa    x    Aa

         AA   Aa   Aa   aa

Since A is dominant over a,

probability of having mole (aa) = 1/4

probability of not having moles = 3/4

Therefore, the probability of the first child not having moles = 3/4 or 0.75

ii. Let the probability of not having mole = p and the probability of having mole = q. From the binomial expansion:

(p + q)^7 = p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7

Probability that all of the children will have moles = p^0q^7

since p = 3/4 and q = 1/4

p^0q^7 = (3/4)^0(1/4)^7 = 0.000061

iii.Probability that the first two children will have no moles and the last five will have moles = 21p^2q5

                       = 21(3/4)^2(1/4)^5

                         = 0.012

iv. Probability that 4 will have no moles and 3 will have moles out of the 7 children = 35p^4q^3

               = 35(3/4)^4(1/4)^3

                      = 0.17

c. Probability that the child born without moles is a carrier of the a-allele  = probability of heterozygous.

From the cross in (b), the genotypes of those born without moles are AA and 2Aa. Therefore, the probability of not having moles and be Aa is:

      = 2/3 or 0.67

Which of the following statements is true?O Cold blooded animals have cold blood.
Cold-blooded animals change their body temperature to match the environment.
Mammals and birds are usually cold blooded.
All of the above.

Answers

Answer:

Explanation:

Cold blooded animal did not have cold blood.

Cold blooded animals can’t change their body temperature to match the environment.

Mammals and birds are not cold blooded.

Final answer:

Endotherms, such as mammals and birds, are able to maintain a constant body temperature in the face of changing environmental conditions. In contrast, cold-blooded animals, or ectotherms, have a body temperature that matches their environment and varies with it.

Explanation:

An animal that maintains a constant body temperature in the face of environmental changes is called an endotherm. These animals are able to maintain a level of activity that an ectothermic animal cannot because they generate internal heat that keeps their cellular processes operating optimally even when the environment is cold.

Mammals and birds evolved endothermy, meaning they regulate their body temperature from the inside through metabolic or physical changes. This allows them to maintain a relatively stable body temperature regardless of the outside temperature.

Cold-blooded animals, also known as ectotherms, rely on external temperatures to set their body temperature. Their body temperature varies with the environment.

When a river makes an "S" shape, cutting through the land, the process is known as

Answers

i think its abrasion

Answer:

Erosion

Explanation:

What is the function of neurotransmitters?

Answers

neurotransmitters are often reffered to as the body's chemical messangers. They are the molecules used by the nervus system to transmit messages between neurones, or from neurones to muscles. Communication between two neurones happens in the synaptic cleft (the small gap between the synapses of neurones).
it helps control the alertness and arousal

What difference between heterozygous and homozygous?

Answers

A heterozygous individual is if a mutation occurs in just one copy of the gene.
If both copies of the gene are mutated than the individual is homozygous
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Tail length in mammals is a heritable trait. A pig with a 6 cm tail was mated to a pig with a 30 cm tail. All F1 offspring had a tail of length 18 cm. An F2 generation was made by crossing F1 individuals. This resulted in many piglets whose tails ranged in 4-cm intervals from 6 to 30 cm (6, 10, 14, 18, 22, 26, 30). The majority of pigs had 18 cm tails, 1/64 had 6 cm tails, and 1/64 had 30 cm tails.These results are consistent with what genetic model?(a) Two genes, each with two alleles that show dominance(b) Two genes, each with two alleles that act additively(c) Three genes, each with two alleles that show dominance(d) Three genes, each with two alleles that act additivelyAn F2 piglet with an 18 cm tail is heterozygous at each of the tail-length loci, and is mated to an F2 piglet with a 6 cm tail. Write down the predicted offspring genotypes and calculate the predicted tail lengths. What is the expected frequency of piglets with a 14 cm tail length?
Some prokaryotes once classified in the domain Bacteria are now classified asFungiPlantaeArchaeaProtista