What did Hooke and Leeuwenhoek discover about cells by using a microscope?

After settlers migrated to North America, resources were used to establish housing and farm and grazing lands.

Sympatric speciation involves reproductive isolation of dispersed populations. is common in plants since many plant species can reproduce by self-fertilization. is often associated with polyploidy in animals.

Which structures produce a fluid to protect the body in the first line of defense? Select four options. hair stomach mouth eyes skin

The process by which organisms make more organisms of the same kind is called

The circulatory system of a vertebrate that uses lungs for respiration has A. Three or more loops. B. No loops. C. A single loop. D. A double loop.

Which of the following statements is not true? Essential nutrients can be synthesized by the body. Vitamins are required in small quantities for bodily function.

Trees have active transport, why?

The question is how many chromosomes are in the sperm cells, and how many chromosomes will it's zygote have.

Recent research has found that on one island of the Galapagos two finch species interbred. This interbreeding may have resulted in a hybrid species that ultimately led to the extinction of one of the species Darwin discovered.

Which of the following statements about internal membranes in eukaryotic cells is false? a. In eukaryotic cells, internal membranes standardize the internal environment of all cellular organelles. b.