Table 1 Millions of Years Ago (Mya) Event First humans (genus Homo) The Origin of the Earth First eukaryotes First grasses K-T boundary mass extinction First plants on land First flowering plants

Q: Fill in the blank:  _________________ is the phase of development during which cellular divisions…

A: The multicellular organisms develop from an early stage called an embryo. Embryonic development…

Q: How Plants and animals reproduce.

A: The process of reproducing individuals of the same species is known as reproduction. The majority of…

Q: Use the following word bank to create a negative feedback mechanism and then a positive feedback…

A: Feedback mechanism or feedback loop in the body is the mechanism or the loop that helps to maintain…

Q: discuss answer to step 4 further

A: The Erythrocyte Sedimentation Rate or the "sed rate" is a diagnostic test that reveals the presence…

Q: Viruses and chemicals that cause congenitalanatomical deformities are called ______.

A: Virus is a non-living pathogenic agent which depends on its host for survival. It is  composed of…

Q: prepare sketches Eight-cell sea urchin embryo

A: Step 1 Phylum Echinodermata is of spiny skinned, triploblastic, enterocoelomic, deuterostomic…

Q: Match the following tissues/organs to the germ layer from which they are derived   Pituitary gland…

A: During embryonic development three germ layers are formed: the ectoderm, mesoderm and endoderm. Each…

Q: Write in detail the process of organogenesis in vertebrates. Give one example and make diagram also.

A: In embryology, Organogenesis can be described as a series of processes that lead to converting the…

Q: Evolutionarily speaking, who among the following is the "fittest"... Mary is a successful…

A: The concept of "fitness" in evolution refers to an individuals ability to survive and reproduce in a…

Q: Define proliferative phase

A: The proliferative phase can be defined as the phase in which the multiplication and spreading of…

Q: D C B- А 'E G

A: The given diagram represents the female reproductive organ with baby. We need to identify the parts.

Q: Define germinal center

A: These are sites that are abundantly present in the secondary lymphoid organs- the lymph nodes and…

Q: Which of the following is NOT a function of the placenta? Question 23 options: To supply the…

A: By unraveling the intricacies of the placenta, we can gain a deeper appreciation for the remarkable…

Q: Name specific structure "A" placenta Name specific structure "B" pedicel В A

A: The above picture shows an image of tomato which belong to angiosperm. It reproduces by sexual…

Q: Write the name of the structure that the phrase describes. Milk-producing glands

A: The gland is referred to as the organ in the body responsible for secreting molecules or substances…

Q: Define loop of Henle

A: There are several kinds of nitrogenous waste produced by animals because of the different kinds of…

Q: In anatomy lab, Thaya pointed to the vertebrae of a cadaver and said “sclerotome.” He pointed to a…

A: The three primary embryonic germ layers termed the ectoderm, mesoderm, and the endoderm function to…

Q: 1st trimester: Week: 0-12 = 2nd trimester:_________? > week 12-24 > week 13-24  > week 12-26  >…

A: Note: ">" is considered as bullet points and not the greater than symbol. Reproduction is the…

Q: For each section of the Table below, use the diagrams to identify the stage of childbirth…

A: Many factors must come together in order for a baby to be born. The first step happens when a female…

Q: A friend tells you that she doesn’t want to feed her baby highproduction milk because she is afraid…

A: Genetic engineering, also known as genetic modification, is the process of varying or changing the…

Q: The period from birth to the natural death of an organism represents?

A: An organism is a living creature with a well-organized structure that can reproduce, develop,…

Q: Use the image as a reference to answer the questions below. Question 1: Give the enzymes capable of…

A: Menstrual Cycle --Female reproductive system involves the communication between brain centers and…

Q: A ball of cells that inside is full of cells is called?

A: Answer: The blastula is a hollow sphere of cells, referred to as blastomeres, surrounding an inner…

Q: 12. 11 14 13 10

A: Eggs of chicken are telolecithal and they divide through meroblastic cleavage. The development and…

Q: Illustrate and describe the life cycle of the following:  Necator americanus

A: Necator Americanus is a species of hookworm.

Q: Explain the following terms: ectoderm, endoderm, mesoderm and stem.

A: Animal phylogeny is a rapidly changing field. The biologists mostly depend on the fossils to compare…

Q: Which type(s) of embryological testing would you perform in order to determine the level of…

A: The process of formation of an embryo with the uterus is known as embryogenesis. It is a complex…

Q: In 2 paragraphs, explain why early childhood is an important stage in human growth

A: Early childhood development serves as a building block for overall development of a child. Early…

Q: No. 1 Write a detail note on milk quality analysis

A: Quality milk: A milk is said to be quality milk if it is  free of debris and sediment; flavourless…

Q: In embryos with spiral cleavage the 4d cell gives rise to which germ…

A: INTRODUCTION Mesoderm It is a germ layer formed during gastrulation. Present between ectoderm and…

Q: Give the name of the structure that the phrase describes. Primary germ layer that gives rise to…

A: Fertilization occurs when male gamete (sperm) fuses with the female gamete ( ovum) to produce a…

Q: Can I use the short prefix version of a word in a sentence .  'The stem cells can develop into…

A: No, it is not correct to write short prefixes such as ecto, meso, and all. Because words like…

Q: (fetal pig) What is the name of the organ indicated by the number 8 arrow?

A: Dissection  is the dismembering of the body of a deceased animal to study its anatomical structure.…

Q: __________ is the process by which egg cells are formed.

A: Gametes are the reproductive cells of an organism. In females, the gametes are called ova or egg…

Q: An egg and similar share:     the same size     the same degree of mobility     the same…

A: An egg is female gamete and sperm is male gamete. Both are used in the process of progeny…

Q: Name specific opening "A" micropyle Name specific structure "B" placenta A - MacBc

A: Lilium ovary The ovary contains one or more ovules, which in turn contain one female gametophyte…

Q: Based on what you know about the goal of gastrulation, suggests the direct developmental consequence…

A: Embryonic development is the process of development of an embryo.  Gastrulation is a process that…

Q: which does not belong to the group? nipples, pinna, lips or cere

A: An organ is a group of tissues with similar functions that are performed by them inside and outside…

Q: Give the name of the structure that the phrase describes. The “bag of waters” that breaks at birth.

A: The phrase “bag of waters” represents amniotic sac which is present in the uterus of a pregnant…

Q: People could observe the development of an embryo before they had the tools to see cells and parts…

A: Answer :- The fertilized egg (zygote) separates over and over as it drops down the fallopian…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.