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Mamont248 [21]
3 years ago
8

Hi!!!! Please help!! Desperately need biology help!

Biology
1 answer:
OLga [1]3 years ago
7 0

Answer no 8:

The correct option is D) Antelopes with muscular legs are bale to outrun their predators better than antelopes with poor muscle tone. Thus they lived to reproduce.

Explanation:

Genetic variations in a population are the main reason that natural selection tends to occur. Natural selection favours those organisms which have better characteristics.The organisms with better traits are able to reproduce and pass on their characteristics to their offsprings.

Answer No 10:

The correct option is A) Phenotype directly influences the interaction of an organism with its environment.

Explanation:

The interactions between the phenotypic traits and the environment analyze whether a particular organism will be able to survive and pass on its characteristics to its offspring. Hence, the phenotype directly influences the interaction of an organism with its environment.

Answer No 9

The correct option is A) resistance to a virus

Explanation:

Mutations can be described as any changes which occur in the DNA of an organism. Mutations might be beneficial or harmful depending on the location where the mutation arises. Viruses are usually harmful for eukaryotes. Hence, the correct option is A.

Answer No 11:

The correct option is C) Giraffes with longer necks survived because they were better suited to the environment.

Explanation:

Natural selection tends to favour those organsims which are better suited to live in an environment. Those organisms with better characteristics are able to survive and pass on their traits to their offsprings.

The giraffes with longer necks were better adapted to live in the environment and hence were favoured by natural selection.

Answer No  12:

The correct option is D) selective breeding

Explanation:

Selective breeding can be described as a technique in which organisms with better characteristics are crossed, so that offsprings with better characteristics can be produced. Selective breeding is done by humans where as natural selection is done by the nature.

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According to the theory of natural selection some individuals in a population survive while others die he proposed that survival
ollegr [7]

Answer:

Possession of inherited adaptations that maximize fitness.

Explanation:

Basically ones that are best adapted for their environment. (I'm assuming "he" is Darwin?)

6 0
3 years ago
Ability to roll the tongue is caused by a dominant allele. A woman is a "roller," but one of her parents is not. Reference: Ref
matrenka [14]

Answer:

1/2.

Explanation:

The autosomal dominant trait may en defined as the trait that can express itself even in the heterozygous condition and in the homozygous dominant condition as well.

Let the B allele is responisble for the roll tongue and b is recessive allele. The woman can roll the tongue and she must have the genotype Bb because her one parents is normal. The woman married with a man with non roller ( bb). The Bb × bb cross results in the following progeny Dd, Dd ( roller), dd and dd ( non roller). The probability of the child being a roller is 1/2,

Thus, the answer is 1/2.

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3 years ago
Which of the following is an abiotic factor in an ecosystem?
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Sunlight - it is the only thing that is not living in the list. 
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Most sedimentary rock is made from sediments of other rock. Which of these processes would the sediments MOST likely go through
hoa [83]

Answer: A-compaction and cementation

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A protein is 300 amino acids long. Which of the following could be the number of nucleotides in a bacterial gene that codes for
butalik [34]

Answer:

2) 100

Explanation:

  • Every 3 nucleotides in an mRNA specifies the addition of one amino acid in a protein.
  • Each three-letter "word" which is the combination of nucleotides is called a codon.
  • Therefore, amino acids are coded by a series of three-letter "words" - a 300 nucleotide mRNA will code for a 100 amino acid protein.
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