What description explains how a flower produces a seed? (2 points) Group of answer choices

1/After the stamen produces pollen, the pollen is moved to the petal to produce a seed.

2/As pollen travels down the stamen, fertilization occurs and a seed is produced.

3/When the ovule receives pollen, fertilization occurs and a seed is produced.

4/When the stigma receives pollen, a seed is produced and then fertilization occurs.

question 2/Non-flowering, cone-bearing plants produce seeds in the cone. Other plants, like ferns and mosses, are non-flowering and do not produce cones or seeds. How does a fern begin the first stage of the life cycle? (2 points)

Group of answer choices

1/It produces seeds instead of spores.

2/It produces spores instead of seeds.

3/The seeds turn into spores, which germinate.

4/The seeds sprout and germinate into seedlings.

What are genotypes? what are phenotypes?

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i.e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.

Sperm pass through the and connect to a short ejaculatory duct. vas deferens prostrates seminiferous tubules none of the above