Reproduction (the Living Environment)

The are a number of different strategies various organisms use in order to reproduce asexually (for example, budding, binary fission, sporulation, etc). What they all have in common is:

• Offspring are from one parent, and are clones.
• Offspring produced from one parent, and are genetically unique.
• Offspring are produced from 2 parents, and are clones.
• Offspring are produced from 2 parents, and are genetically unique.

Tags

NGSS.MS-LS3-2

An ovum of a certain flowering plant has 32 chromosomes. Which other cell from this species would also have 32 chromosomes.

• A zygote.
• A sperm cell.
• A cell from it's leaf.
• A cell from it's roots.

Tags

NGSS.HS-LS3-1

Which 2 cells have the same chromosome number, if taken from the same species?

• An egg, and a liver cell
• A sperm, and a zygote
• A zygote, and a brain cell
• A zygote, and an ovum.

Tags

NGSS.HS-LS3-2

Which is NOT true about the placenta?

• Nutrients, gases, and wastes diffuse in 2 directions within it.
• It is formed from a combination of fetus and uterus cells. 
• Found only in mammals
• Maternal and fetal blood mix in this structure.

Which hormone is associated with regulation of the menstrual cycle?

• Progesterone
• Estrogen
• Testosterone
• Insulin

Tags

NGSS.HS-LS1-3

If cells are taken from a certain plant, divide by mitosis, and develop into a new plant, than which statement is true? 

• It is a form of sexual reproduction.
• The new plant has 50% of it's DNA from each of 2 parents
• It is a form of asexual reproduction.
• Meiosis occurs between mitosis and full development.

Tags

NGSS.HS-LS1-4

Where is a likely location for receptors for the hormone testosterone?

• The cells of the female reproductive sytsem.
• the cells of the male reproductive system.
• liver cells.
• Pancreas cells.

During the development of an embryo, at a certain stage, a structure called a gastrula forms, which has 3 tissue layers (and thus, 3 cell types). What is the significance of this stage.

• It is where differentiation begins
• mitosis speeds up during this stage.
• Meiosis occurs for the first time at this point.
• It is when fertilization occurs.

Tags

NGSS.HS-LS1-4

In which structure does fertilization usually take place?

• the vagina
• The testes
• Uterus
• Fallopian Tubes (aka- the oviduct)

In which choice are the four events in the correct order?

• fertilization, cleavage, differentiation, organ development
• cleavage, fertilization, differentiation, organ development
• differentiation, fertilization, cleavage, organ development
• fertilization, organ development, differentiation, cleavage.