#biology

The movement of the calcium ions into certain cells is most likely due to

Living Environment Regent August 2019 Base your answers to questions 36 through 39 on the information and photograph below and on your knowledge of biology. Scientists Investigate Sex Determination in Alligators The sex of some reptiles, including the American alligator, is determined by the temperature at which the eggs are incubated. For example, incubating them at 33°C produces mostly males, while incubation at 30°C produces mostly females. Scientists recently discovered a

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BIOLOGY

Which group of organisms in an ecosystem fills the niche of recycling organic matter back to the env

Which group of organisms in an ecosystem fills the niche of recycling organic matter back to the environment? August 2019 Biologu Regent Exams (1) carnivores (2) decomposers (3) producers (4) predators Answer and Explanation: In order for us to determine the correct answer, we need to know the definitions for each one of the answer choices. Carnivores are organisms that eat other animals. Examples of carnivores are lions and lady bugs. Decomposers are organisms that break oth

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The placenta secretes progesterone and estrogen during pregnancy. Progesterone is responsible for th

The placenta secretes progesterone and estrogen during pregnancy. Progesterone is responsible for the following functions: • maintains the lining of the uterus • inhibits (interferes with) contractions of the uterus • inhibits the production and release of eggs Describe one likely result if the placenta became damaged and could not maintain progesterone levels. Support your answer. [1] The text above states three functions of progesterone. If placenta is damaged and can not

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BIOLOGY

An organ, such as a kidney, used for transplant needs to be tested for compatibility with the person

An organ, such as a kidney, used for transplant needs to be tested for compatibility with the person who is to receive the organ. If this is not done, the (1) donated organ might attack the body (2) donated organ might attack the immune system (3) immune system might attack its own body cells (4) immune system might attack the donated organ Answer and explanation Organ transplants are used widely for those people, whose organs have been damaged and can not function properly,

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Protein functional categories and digestion

Proteins are molecules built from amino acids. Proteins make up a large portion of our body and serve extremely important functions. These functions are: Enzymes - biological catalysts that speed up the rate of reactions in our body. Messengers - some hormones are proteins. Hormones are chemical messengers that are synthesized and secreted by endocrine tissues and target specific organs. Immunoproteins - provide protection to our body in the form of immunoglobulins and antibo

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Digestion and Absorption of Lipids

After being absorbed, long fatty acids come together to reform triacylglycerides and cholesterol esters. Short fatty acids pass directly int

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BIOLOGY

Naming unsaturated fatty acids.

Fatty acids are hydrocarbon chains with carboxylic acid at the end. Unsaturated fatty acids contain one or more double bonds, usually in cis conformation. There are two methods of naming the unsaturated double bonds, delta and omega. Delta naming system: 1. Count carbons starting from the carboxylic end. The total number of carbons in the fatty acid is the first number in the name. 2. The second number represents the number of double bonds. For example 14:2 means there are 14

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BIOLOGY

Which statement is an accurate description of genes?

P.S. How are proteins made? DNA is used as a template to make RNA in a process called transcription. RNA is single stranded and has the base

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BIOLOGY

Which system in a multicellular organism functions most like the cytoplasm in a single- celled organ

Cytoplasm is the fluid that fills the cell and contains all organelles and cell parts. In a multicellular organism, excretion system excret

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BIOLOGY

The shape of a protein is most directly determined by the

The shape of a protein is most directly determined by the amount of energy available for synthesis of the protein kind and sequence of amino acids in the protein type and number of DNA molecules in a cell mistakes made when the DNA is copied Answer and Explanation: Proteins are essential molecules in our body that compose most of the tissue. Proteins are made up from amino acids (molecules that contain an amino group as well as carboxylic acid group). Proteins have primary, s

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