Adaptive evolution means evolutionary changes in an organism that make it suitable for its habitat. Natural selection is the factor that can lead to evolution for change in body color that enabled animals to better hide from predators.
A genetic trait that helps organisms to increase their reproductive success are adaptive traits. It is a type of natural selection.
Adaptive evolution can be done by following process:
Thus,the correct option is A.
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B. similar genes
C. similar habitat
D. similar body size
The most important in classifying two groups of bears into the same genus are similar genes. The correct option is B.
Genus is a taxonomic rank that is used to categorize living and extinct creatures, in terms of biology. Genus is placed below family in the biological categorization hierarchy and above species.
The genus contains similar organisms or animals, that are similar like dogs come into cannis and so the wolves, jackals, and similar animals.
In the case of bears, they will come under the same genus if they have similar genes, if they have similar genes, they have similar traits and characters, which will help in classifying them into a genus.
Similar habitat and similar diets or body size do not matter for classifying in the same genus, because two very different animals can have similar diets or habitats.
Thus, the correct option is B. similar genes.
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b. sound signal
c. language
d. visual signal
Answer:
d. visual signal
Explanation:
Changing color by cephalopods ssuch as squid & octopi is a type of visual signal which helps in communication. These creatures are highly social animals and for social behavior communication is a must. So, in order to communicate effectively, they often change the colors and patterns of their skin. Initially this ability to change color was meant for camouflage but later on these animals started using this ability to communicate. The control centre of such visual signals is their brain which can manipulate thechromatophores within their body. They usually use such visual signals during courtship rituals and hunting.
The Jurassic period had angiosperms, while the Cretaceous did not.
b.
Pangaea split during the Jurassic period.
c.
There were dinosaurs in the Jurassic period, which went extinct in the Cretaceous period.
d.
Conifers and ferns were present in the Jurassic period, but not in the Cretaceous period.
The Cretaceous period differs from the Jurassic period in that there were dinosaurs in the Jurassic period that became extinct in the Cretaceous period, as the dinosaurs that were available in the Jurassic period are in Option C.
They were significant as they were the dominant land animals during the Mesozoic Era and evolved into a wide variety of forms, from the large, long-necked sauropods to the small, agile raptors, and they gave insights into the evolution of life on Earth. Dinosaurs help scientists understand the patterns and processes of evolution, including how animals adapt to changing environments and showed the link with birds.
Hence, the Cretaceous period differs from the Jurassic period in that there were dinosaurs in the Jurassic period that became extinct in the Cretaceous period, as the dinosaurs that were available in the Jurassic period are in Option C.
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Answer:
c.
There were dinosaurs in the Jurassic period, which went extinct in the Cretaceous period.
Explanation:
the answer is correct I just put a star by accident hahahah
b. heterotrophs.
c. thylakoids.
d. plants.
Answer: Heterotrophs
Explanation:
Organism that cannot make their own food and depends on the external sources for its energy are known as the heterotrophs.
They are dependent on the other organisms for their energy. They feed on the plants or animals for their energy.
Other than plants all the other organisms are dependent on food from other sources as they lack the ability to make food by their own.
Heterotrophs are the organisms that feed on other organisms to get energy to survive. Option B, Heterotrophs.
Organisms are classified into autotrophs and heterotrophs depending on how they get energy.
Heterotrophs need to feed on other organisms to get the necessary energy to survive. They do not produce their own food as producers do.
Depending on the food chain, heterotrophs might be either primary, secondary, tertiary consumers, and so on.
Also, depending on their source of food, they might be either herbivores (if they feed on plants) or carnivores (if they feed on animals). Omnivores can feed either on plants or animals.
In the exposed example, the organisms that cannot make their own food and must obtain energy from external sources are called heterotrophs.
The correct option is b. Heterotrophs
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b. Catherine the Great.
c. Michael Romanov.
d. Ivan the Great.