Biology

Facilitated diffusion requires energy and can transport molecules against a concentration gradient. True or False True False

5 The process of differentiation occurs when (1) two different cells, a sperm cell and an egg cell, combine to produce a zygote (2) different zygotes are formed each time that an egg and sperm unite (3) different kinds of cells and tissues form during embryonic development (4) two different sexes are present among the offspring, after sexual reproduction

How might an entire insect be preserved? Soft and hard tissues turn the insect into rock Tree sap flows over the insect and hardens. Sediment accumulates over the insect and hardens Carbon from the decaying insect leaves a print on a rock

3. In a Punnett square where are the parents' alleles (genes)written? a. Inside the boxes b. On top and left of the boxes c. Only on top of the boxes d. Only on the left of the boxes

A mutation is __ (1 point) Any change in the amino acid sequence Any change in the DNA sequence. Always bad Always good

The somatosensory cortex is also known as the post-central gyrus and is part of the parietal lobe. True False

19. What does S stand for and what occurs in this stage? 20. What does G_(2) stand for and what occurs in this stage?

DNA and Natural Selection What is the connection between genetics and natural selection? Individuals vary in their appearance and that variation causes mutations. Genes vary between individuals and that variation causes mutations. Mutations can lead to variation that may affect an individual's survival.

Can you think of any other times besides when you break a bone that your body repairs itself?

14. Which of the following is an example when an uncontrolled experiment is best? When testing plant growth When testing the effect of water on a lawn When working with the human body When testing the effect of sugar on a starch