When people look through a telescope, air currents in the earth’s atmosphere can distort the images they see. in the 1950s, a scientist named h. w. babcock thought of a way to reduce this distortion by using a special device within the telescope. however, this device was not used until the 1990s.

which best explains why babcock’s idea took many years to become a reality?
scientists started using electron microscopes instead.
scientific telescopes were already using advanced technology.
scientific ideas often have to wait until advancements in technology make the ideas possible.
scientists often feel their ideas place an unnecessary burden on the research to develop telescopes.
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Scientific ideas often have to wait until advancements in technology make the ideas possible.

In the early, 1950's Dr. Babcock developed a plan of an instrument that could be used to observe  distant stars and galaxies. But because of lack of financing, the system was developed after 20 years in 1990's. This technology was supported with high powered lens by Department of Defense in Washington. The necessity of instrument came into observation and led to the development. Therefore, science ideas often have to wait until advancements in technology make the ideas possible.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

: )