1. Introduction to Biology

2. Chemistry

3. Water

4. Biomolecules

5. Cell Components

6. The Membrane

7. Energy and Metabolism

8. Respiration

9. Photosynthesis

10. Cell Signaling

11. Cell Division

12. Meiosis

13. Mendelian Genetics

14. DNA Synthesis

15. Gene Expression

16. Regulation of Expression

17. Viruses

18. Biotechnology

19. Genomics

20. Development

21. Evolution by Natural Selection

22. Evolution of Populations

23. Speciation

24. History of Life on Earth

25. Phylogeny

26. Prokaryotes

27. Protists

28. Plants

29. Fungi

30. Overview of Animals

31. Invertebrates

32. Vertebrates

33. Plant Anatomy

34. Vascular Plant Transport

35. Soil

36. Plant Reproduction

37. Plant Sensation and Response

38. Animal Form and Function

39. Digestive System

40. Circulatory System

41. Immune System

42. Osmoregulation and Excretion

43. Endocrine System

44. Animal Reproduction

45. Nervous System

46. Sensory Systems

47. Muscle Systems

48. Ecology

49. Animal Behavior

50. Population Ecology

51. Community Ecology

52. Ecosystems

53. Conservation Biology

[BOOK BIO] CLUTCH

No. One of the choices is a group of archosaurs.

Dinosaurs are archosaurs.

Which of the following is an archosaur group?

HHMI BioInteractive: The Origin of Birds

The Synapsida and the Evolution of Mammals

Evolution of birds and their unique features

Suppose you are heterozygous for two genes that are located on different chromosomes. You carry alleles A and a for one gene and alleles B and b for the other. Be sure to list all the genetically different gametes that could form and indicate how frequently each type should be observed.

Placental Mammals

The Amniotic Egg

No. An operculum is a bony flap that protects the gills of bony fish.

No. Vertebrates had radiated into terrestrial, aquatic, and aerial habitats prior to the evolution of the placenta.

No. This is a sensory structure characteristic of many aquatic vertebrates.

No. Bony appendages are a shared primitive character also found in amphibians and some bony fish.

How is the reproduction of birds different from that of frogs?

The adaptation that freed vertebrates from water for reproduction and allowed them to radiate into diverse terrestrial environments was the __________.

Aminotes

How well do you know our Monotremes?

Ep 1: Introduction to the Platypus

Birds and Synapsids

Marsupials and Placental Mammals

What two major lineages make up the living Amniota?

Which statement is true about endothermy in mammals and birds?
a. They both inherited this trait from a common ancestor.
b. Birds are more closely related to mammals than to reptiles.
c. Endothermy arose independently in these two lineages.
d. Birds are reptiles and all reptiles are ectothermic.

Amniotic Egg 2020

An Introduction to the amniotes

Monotremes-egg laying mammals

Eutherian Mammals (Zoology 5/4/2020)

Lecture 61 The Origin of Flight in Birds

The blending inheritance hypothesis proposed that the genetic material from parents is mixed in the offspring. As a result, traits of offspring and later descendants should lie between the phenotypes of parents. Mendel, in contrast, proposed that genes are discrete and that their integrity is maintained in the offspring and in subsequent generations. Suppose the year is 1890. You are a horse breeder who has just read Mendel's paper. You don't believe his results, however, because you often work with cremello (very light-colored) and chestnut (reddish-brown) horses. You know that when you breed a cremello individual from a pure-breeding line with a chestnut individual from a pure-breeding line, the offspring are palomino—meaning they have an intermediate (golden-yellow) body color. What additional cross would you do to test whether Mendel's model is valid in the case of genes for horse color? According to his model, what offspring phenotype frequencies would you get from your experimental cross? Explain why your cross would test Mendel's model versus blending inheritance.

Mammalian Reproduction

Types of Mammals

No. Birds and reptiles do lay amniotic eggs.

No. Birds and reptiles do have a bony vertebral column.

No. Both of these groups do have keratinized scales; in birds they have differentiated into feathers.

No. This is a diagnostic feature of the chordates.

Consider how a bird differs from a snake.

Which of the following characteristics is not shared by extant birds and extant reptiles?

Amniotic Egg

Mammals and Monotremes

No. In placental mammals, embryonic development is completed within the uterus; this is not true for opossums.

No. Eutherians are placental mammals. In placental mammals, embryonic development is completed within the uterus; this is not true for opossums.

Opossums have pouches.

The opossum is an example of a(n) __________ mammal.

Suppose you are heterozygous for two genes that are located on different chromosomes. You carry alleles A and a for one gene and alleles B and b for the other. On the diagram, identify the events responsible for the principle of segregation and the principle of independent assortment.

How Marsupials Are Different From Other Mammals (4K)

5-  Synapsida

Diversity of life (9), selected placental mammal orders, monotremes, and marsupials

Some mammals lay eggs! Intro to Mammals

Vertebrates 7- Amniotic egg

complete their embryonic development in the uterus

All of the specific listed responses are correct.

None of the specific listed responses is correct.

nourish their offspring through mammary glands

Think about the many ways mammals reproduce.

All mammals __________.

The three different ways mammals give birth - Kate Slabosky

Unlike eutherians, both monotremes and marsupials
a. lack nipples.
b. have some embryonic development outside the uterus.
c. lay eggs.
d. are found in Australia and Africa.

amniote diversity 1: anapsids, synapsids

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