Answer:
Reproduction is vital to the success of a species.
explain:
For a species to survive it must be able to produce more offspring than it loses though old age, disease, and predication. Living things can reproduce in different ways, asexual reproduction and sexual reproduction.
Answer: The correct option is D, because a person having sickle cell anemia must be homozygous for the trait.
Explanation: Sickle cell disease is autosomal inherited disease. In this disease the shape of red blood cell change from round to crescent shape, as a result it become unable to carry oxygen because it can not pass through capillaries. When
Glutamine amino acid is replaced by
Valine the shape of hemoglobin become sickle shaped.
Genetics of Sickle cell anemia:
This disease appears in homozygous recessive from. Genes for sickle cell is represented by
"S" while for normal it is represented by capital
"A". If a carrier man marry a carrier woman then 50% of child will be sickle celled, 25% will be normal and 25% will be carrier for disease as shown in the figure
Answer: C
Explanation: Wherever the sun is, the plants will lean/follow
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Answer:
A climax community develops
The glacier retreated, leaving barren only rock
Lichen and other pioneer species grown on the rocks
Rock is broken down and converted into soil
Grasses and flowering plants grow in the soil
Shrubs and small trees grow in the soil
Small pine trees grow in the soil
Explanation:
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