To be clasified as an animal an organism must you have a backbone

Which of these is an advantage of wind energy? A. It reduces bird and bat populations. B. It generates noise pollution. c. It generates electricity. D. It increases greenhouse gas emissions.

Compared with boys, girls tend to spend a) more time in competitive sports. b) less time in clubs c) less time engaging in social relationships. d) more time with friends.

Sue has normal hearing but her sister suffers from deafness determined by a rare recessive allele. what is the probability that sue's phenotypically normal daughter is heterozygous for the gene?

Hypothesize about human impact on each of earth's systems

In a cell if ΨP = + 0.3MPa and ΨS=-0.45MPa, then the resulting Ψ is ___. Enter your answer with either a + or a - before the number and no words.

Which factors contribute to changing igneous and sedimentary rocks into metaphoric rocks? Select all that apply. Weathering Erosion Heat Deposition Pressure

How many and what type of chromosomes would be expected in a karyotype of a human male? 22 pairs of autosomal chromosomes and 2 Y chromosomes. 23 pairs of autosomal chromosomes and 2 Y chromosomes.

A species has homologous chromosomes. what does this say about the species?

Which has the greatest effect on the amount of salt in a salt marsh? These are the choices

The reproductive process that creates genetic variety in a population is