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Sveta_85 [38]
3 years ago
10

Science! Please help, Thanks if you do.

Biology
1 answer:
arlik [135]3 years ago
7 0

Answer:

Explanation:

Mutation is the word used to describe the heritable change in genetic makeup of an organism. This change in turns may help with adaptation for survival or be a disadvantage to the organism in its environment.

Natural selection is a concept in evolutionary biology that describes the process by which heritable traits are confered for survival and reproductive advantage to individuals. It also focus on how related individuals, tend to be passed on changes in traits to succeeding generations and how this trait become more frequent in a population while also observing how other less favourable traits and weak individuals tend to become eliminated from the environment.

Choosing two examples from the above;

• For instance, having large bodies and dark fur serves the purpose to camouflage, for mimicry, and big animals' body parts for agility in competition and colour helps to cover themselves. All these mutations that increases body size and changes the fur color are for physical adaptations.

If there is a change in this features the animals are easily exposed and may not survive.

• Some specific parts of the body of variety of animals are adapted to survival as the environment changes. Among such features are having sharp claws and sharp teeth. A mutation like this provides the animal with body structure that is adapted to survival. Without these features feeding and catching preys for some omnivores and carnivores would be almost impossible reducing the population size.

• Having body structure like dull teeth and hooves are adapted for the survival of terrestrial leaves grazers. Hooves makes running faster and escaping from predators easy. Dull teeth however makes grass cutting for ruminant animal easy.

In the occurrence of forest fire the hooves animals can escape easily, the big bodied animals will be disadvantaged. When the weather or climate changes mimicry / camouflage fur is will be disadvantaged.

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A three banded isoenzyme pattern with a 1:2:1 intensity ratio indicates a ________________ protein.
djverab [1.8K]

A three banded isoenzyme pattern with a 1:2:1 intensity ratio indicates a <u>dimeric</u> protein.

  • Isozyme is a multimeric forms of enzyme having similar specificity of the substrate but differences in kinetics and molecular weights of the enzymes.
  • The banding patterns of isozyme observed from electrophoresis is related to the genetic conditions in which different combination of polypeptide chains exhibited under the mendelian principles.
  • Hence with the intensity of 1:2:1 ratio, three banded phenotypes are formed having two homomeric and one heteromeric form from the dimeric protein in both multiple alleles at single loci and multiple /single allele at multiple loci.

Learn more about Isoenzyme on brainly.com/question/13030441

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7 0
2 years ago
What structure forms during angiosperm fertilization but does not form during fertilization among other types of plants?
OLEGan [10]
The answer is '<span>triploid cell'. 
</span>

This occurs when two sperm nuclei reach the interior of a female gametophyte, where one sperm will fertilise the egg cell to form a zygote, whereas the other usually fuses with the binucleate central cell, forming a primary endosperm cell, effectively constituting an organism separate from the growing embryo. Approximately 70% of angiosperm species have polyploid endosperm cells which are typically triploid (containing three sets of chromosomes), but can vary widely from diploid(2n) to 15n.

5 0
3 years ago
Please help and explain.
horsena [70]
I got you :)


The molecular clock (based on the molecular clock hypothesis (MCH)) is a technique in molecular evolution that uses fossil constraints and rates of molecular change to deduce the time in geologic history when two species or other taxa diverged. It is used to estimate the time of occurrence of events called speciation or radiation. The molecular data used for such calculations is usually nucleotide sequences for DNA or amino acid sequences for proteins. It is sometimes called a gene clock or evolutionary clock.
4 0
3 years ago
Which division of the ans is responsible for the physiological changes you experience when startled by a loud noise? (module 14.
Sliva [168]

Sympathetic nervous system under the Autonomic nervous system (ANS) is responsible for the physiological changes you experience when startled by a loud noise.

Autonomic nervous system (ANS) is part of the peripheral nervous system (PNS) and is responsible for control of vital functions.

ANS  possesses three divisions, they are : Sympathetic nervous system (SYNS), parasympathetic nervous system and enteric plexus.  Sympathetic nervous system is responsible for flight and fight responses.

SYNS also performs such tasks as relaxing the bladder, speeding up heart rate, and dilating eye pupils.

The ganglions associated with SYNS mostly arise from the thoracic and lumbar regions of the spinal cord.

Learn more about Sympathetic nervous system on

brainly.com/question/14529583

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3 0
1 year ago
1.Describe the shape of the planarian. Was there a difference between the two ends of the planarian?
pav-90 [236]
The planarian has a soft, flat, wedge shaped body and both ends of the body are different
7 0
3 years ago
Read 2 more answers
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