Question

1. Evolution is best defined as

1. Maintain genetic diversity in a population
2. the survival of the fittest.
3. Descent with modification
4. the adaptation of an animal to a change in its environment.
5. the regulation of internal conditions

2. Which of the following statements about natural selection is true?

1. Evolution causes natural selection to occur.
2. Natural selection is a random process that brings about adaptation in populations.
3. Natural selection occurs only in animals.
4. Natural selection is a major cause of evolutionary change.
5. Natural selection causes mutations to occur in an organism.

3. New alleles in a species emerge?

1. Only when they are needed
2. via natural selection
3. via mutation
4. via sexual selection
5. via disease

4. Which of the following structures are homologous?

1. the forelimb of a dog and the hindlimb of a cat
2. the forelimb of a dog and the forelimb of a cat
3. wings of a butterfly and wings of a sparrow
4. the mouth of a mosquito and the beak of a hummingbird
5. wings of a bat and wings of a fly

5. Which of the following groups is NOT a eukaryote?

1. Animals
2. Protists
3. Archaea
4. Fungi
5. Plants

6. Which of the following lack vascular tissue?

1. cone-bearing plants
2. grasses
3. ferns
4. mosses
5. flowering plants

7. Fungi

1. are consumers that use hyphae to absorb organic molecules.
2. are more closely related to plants than they are to animals.
3. belong to Domain Archaea.
4. are gymnosperms
5. are photosynthetic

8. A large phylum that encompasses all animals with a backbone?

8. 1. Arthropoda
   2. Chordata
   3. Echinodermata
   4. Cnidaria
   5. Annelida
9. A population

1. consists of all the species in area.
2. cannot evolve because only organisms evolve.
3. consists of all the organisms of a species in an area.
4. consists of multiple communities.
5. consists of only the female organisms in an area

10. Which of the following is a mutualism?

1. the relationship between a tapeworm and its host
2. a bee pollinating a flower
3. a wolf pack capturing a moose
4. a human eating an apple
5. All of the above

Answer 1

Evelution can be defined as change in the characteristics of a biological population, which are inherited over successive generations.

these characterstic features are the expression of genes and which are tranferred to the next generation through reproduction.The chance of changing these characters are by mutation,genetic recombination or by other source of genetic variation. The evolutionary process are natural selection(survival of the fittest) and Genetic drift.It helps in Maintain genetic diversity in a population

NATURAL SELECTION:

Charles Darwin introduced the term natural selection.It is the important mechanism of evolution.Natural selection is a random process that brings about adaptation in populations.It can occur in every living organisms including plants and animals.

New alleles in species emerged via Naturale selection, Via mutation and also via sexual selection.

HOMOLOGOUS STRUCTURE:Organs that have the same internal structure but perform different functions are called homologous organs. The presence of homologous organs in different organisms indicates that they have evolved from a common ancestor.

eg:the forelimb of a dog and the hindlimb of a cat.

Eukaryotic cell means TRUE cell: here, Archaea is not eukaryote.

Herbaceous plants such as grass lacks vascular tissue.

FUNGI are the consumers that use hyphae to absorb organic molecules.Tey are closely related to animals than plants because the fungal cell lacks the chloroplast and the fungal cell wall contains chitin.Fungi belongs to the domain Eukarya.

A large phylum that encompasses all animals with a backbone is chordata

A population consist of all the organisms in a species in an area and it consist of multiple communities.

MUTUALIS: eg:-a bee pollinating a flower