Which statement best explains how each of the different cell types can develop from the same embryo? The cells have identical genetic instructions, but different parts of these instructions are being expressed in each cell.
Which statement best explains the fact that some identical twins?
Which statement best explains the fact that some identical twins appear different from one another? Their DNA is essentially the same and the environment plays a significant role in the expression of their genes.
Which human activity would most likely reduce the amount of plastic garbage that enters the ocean?
Which human activity would most directly reduce the amount of plastic garbage that enters the ocean? (1) Ban the production and usage of all bags made from recycled plastic.
Do animals carry out autotrophic nutrition and heterotrophic nutrition?
All animals, certain types of fungi, and non-photosynthesizing plants are heterotrophic. In contrast, green plants, red algae, brown algae, and cyanobacteria are all autotrophs, which use photosynthesis to produce their own food from sunlight.
Which statement best describes how a new human trait develops and can be passed on to offspring?
Which statement best describes how a new human trait develops and can be passed on to future generations? During meiosis, a new combination of DNA subunits is formed.
Which statement best explains why different body cells of the same individual?
Which statement best explains why different body cells of the same individual look and function differently? Different genes are activated in different kinds of cells.
Which statement best explains the appearance of these resistant varieties?
Which statement best explains the appearance of these resistant varieties? Penicillin killed the susceptible bacteria, while naturally resistant varieties survived and reproduced.
Which statement best describes the relationship between the number of genes and the number of chromosomes in human skin cells?
Mutations occur mainly in body cells. Which statement best describes the relationship between the number of genes and the number of chromosomes in human skin cells? There are more genes than chromosomes in skin cells.
Which best expresses the relationship between genes and DNA?
Genes contain DNA. Which best expresses the relationship between genes and DNA? Nucleotides.
Which hormones most directly influence the uterus during pregnancy?
Progesterone. This hormone is produced by the ovaries and by the placenta during pregnancy. Progesterone stimulates the thickening of the uterine lining in anticipation of implantation of a fertilized egg.
Which structure below produces chemicals hormones that regulate the female reproductive cycle?
The ovaries produce eggs and hormones.
What would most likely happen if structures were damaged in the early stages of pregnancy?
What would most likely happen if structure X were damaged in the early stages of pregnancy? The genes from the mother would not be turned on in the fetus. The nutrients necessary for development would not be able to reach the fetus. The fertilized egg would not be able to travel from the ovary to the uterus.
What is the mode of nutrition in fungi a autotrophic B heterotrophic C saprophytic D parasitic?
Answer: Fungi shows the saprophytic mode of nutrition….. Fungi are not capable of producing their own food, so they get their nourishment from other sources. Saprotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of dead or decayed organic matter……
What are the classes of protists which exclusively exhibit heterotrophic mode of nutrition?
What are the different types of heterotrophic nutrition? Heterotrophic nutrition can be one of three types – holozoic, saprophytic or parasitic.
What is heterotrophic nutrition explain the process of photosynthesis?
Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. Heterotrophic nutrition is the mode of nutrition where the organism is unable to prepare its food and hence, depends upon plants or other organisms for nutrition.
Which statement best describes how variation is important for the survival of a species that exist in a changing environment?
Which statement best describes how variation is important for the survival of a species that exists in a changing environment? Variation rates increase due to new selective pressures.
Which processes lead to the greatest variety of genetic combinations?
The process that leads to the most genetic variation in sexually reproducing organisms is crossing over. Meiosis is the process of gamete…
Where did Charles Darwin obtain evidence for his theory of natural selection?
A visit to the Galapagos Islands in 1835 helped Darwin formulate his ideas on natural selection. He found several species of finch adapted to different environmental niches. The finches also differed in beak shape, food source, and how food was captured.
Which statement best compares the DNA normally found in these two types of cells in an individual?
Each makes a number of different proteins. Which statement best compares the DNA normally found in these two types of cells in an individual? The two cells have identical DNA sequences and use the same section of the DNA to make these two proteins.
Which characteristic can be used to determine if an organism is living?
Properties of Life. All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Which statement best expresses a basic scientific assumption?
Which statement best expresses a basic scientific assumption? Interpretation of experimental results has provided explanations for all natural phenomena. If a conclusion is valid, similar investigations by other scientists should result in the same conclusion.
Which observation provides the best evidence that two different animals most likely have a common ancestor?
Which observation provides the best evidence that two different animals most likely have a common ancestor? They have similarities in early embryonic development.
Which statement best supports Darwin’s theory of evolution?
Which statement is best supported by the theory of evolution? Populations that have advantageous characteristics will increase in number.
How do you explain natural selection?
Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.
Which statement best describes the relationship between inherited traits and genes?
Which statement best describes the relationship between inherited traits and genes? An individual’s inherited traits are determined by genes, which are located inside a person’s chromosomes.
Which of the following statements best describes how genes relate to traits?
Which of the following statements best describes how genes relate to traits? genes code for the production of specific proteins. These proteins lead to different traits. Why did Mendel remove the stamens of some pea plants during his first experiments?
Which statement correctly describes the relationship between genes proteins and traits?
Which statement correctly describes the relationship between genes, proteins, and traits? Genes are translated into proteins. The proteins are then transcribed into mRNA, which determines specific traits.
Which best describes the relationship between DNA genes and chromosomes?
Which best describes the relationship between DNA, genes, and chromosomes? Genes are segments of DNA which form tight coils called chromosomes.
What is the difference between a dominant trait and a recessive trait?
What is the difference between dominant and recessive traits? Dominant traits are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive.
Where do the genes that determine an individual’s traits come from?
Each of your parents has two copies of each of their genes, and each parent passes along just one copy to make up the genes you have. Genes that are passed on to you determine many of your traits, such as your hair color and skin color.