Cells need both genes, and each cell inherits half of the genes from both cell parents.
Answer
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A. Radioactive markers
Explanation
Hershey and Chase used specific radioisotopes to form a trace of the two important components of the virus in its life cycle. The 32P was used to identify the DNA while the 35s labeled the proteins.DNA strands have a sugar phosphate where as protein contains sulfur.
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Answer: DESERT
Explanation:
Adaptation can be defined as the modification in the form, structure, function and behaviour of organisms in a habitat which enables them to live successfully and reproduce.
Desert is one of the types of the world biomes that is characterized with little or no rain and to extreme temperatures. Organisms, which includes plants and animals, must show some level of adaptation to able to survive the harsh environment.
The type of PLANTS which can survive in desert environment are called the XEROPHYTES. They show the following adaptations:
--> The roots are well developed: they grow down to great depths and branch extensively in order to absorb water
--> they possess swollen stems which contains water storage cells.
--> they have reduced leaves, for example in cacti in the form of spines, which helps to reduce water loss through transpiration.
The type of animal that survive in desert environment spend the hot dry seasons in a sleep-like torpid state called aestivation. This is so in order to avoid the heat. Their body size is usually small and less bulky: greater surface area in relation to body volume, thus enhancing heat loss from the body.
Organisms that live in the _________ must be adapted to little or no rain and to extreme temperatures.
1. Organic compounds that contain carbon, hydrogen and oxygen and are the main source of energy for the body.
= CARBOHYDRATES
2. Inorganic substances found in foods needed for growth, regulation and development.
= MINERALS
3. Organic substances found in foods that aid enzymes. = VITAMINS
4. Fats, oils, and waxes that are insoluble in water. = LIPIDS
5. Organic compounds composed of amino acids that form the structure of the body.
= PROTEINS
6. Proteins that help drive the chemical reactions that occur in the body.
= ENZYMES
7. The conversion of the energy found in foods into a usable form of energy for the body.
= METABOLISM
Global warming affects the spread of animals because different areas will become suitable for different species, so they spread out. This can cause diseases to spread, as the animals may bring them with them. This can also happen in the opposite direction, where the climate change causes less habitats to be suitable for animals, so they become more sparse
