Explanation:
Homologous chromosomes are 2 physically different chromosomes that have the same genes but are not genetically identical. Sister chromatids are 2 copies of a single chromosome and so are genetically identical (they also are physically attached to one another).
Answer:
Climate change has been described as one of the biggest problems faced by humankind. Carbon dioxide is is the primary driver of global warming. Prof Joanna Haigh from Imperial College London explains why this gas has played a crucial role in shaping the Earth's climate.
Carbon dioxide (CO2) has been present in the atmosphere since the Earth condensed from a ball of hot gases following its formation from the explosion of a huge star about five billion years ago.
At that time the atmosphere was mainly composed of nitrogen, CO2 and water vapour, which seeped through cracks in the solid surface. A very similar composition emerges from volcanic eruptions today.
As the planet cooled further some of the water vapour condensed out to form oceans and they dissolved a portion of the CO2 but it was still present in the atmosphere in large amounts.
<em>A</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em>:</em>
YY
<em>E</em><em>x</em><em>p</em><em>l</em><em>a</em><em>n</em><em>a</em><em>t</em><em>i</em><em>o</em><em>n</em><em>:</em>
Y-purple while y-white
YY is the genotype of a pure breed purple flowered pea plant
Yy is the genotype of a heterozygous pea plant flower (purple is dominant over white)
yy is the genotype of a white flowered pea plant that is generally called as recessive
Answer:
The fossils in the lower layers are older than the fossils in the upper layers.
Explanation:
ATP is a molecule that stores <u>ENERGY</u> in its phosphorus bonds.
